@inproceedings{ZaussingerHaunNebenetal., author = {Zaussinger, Florian and Haun, Peter and Neben, Matthias and Egbers, Christoph and Mutabazi, Innocent}, title = {Dielectrically driven convection in spherical gap geometry}, series = {International Conference on Rayleigh B{\´e}nard Turbulence, May 14-18, 2018, Enschede, NL}, booktitle = {International Conference on Rayleigh B{\´e}nard Turbulence, May 14-18, 2018, Enschede, NL}, pages = {S. 86}, language = {en} } @inproceedings{JongmannsMeyerMeieretal., author = {Jongmanns, Marcel and Meyer, Antoine and Meier, Martin and Kang, Changwoo and Mutabazi, Innocent and Egbers, Christoph}, title = {Experiments on thermoelectric convection in dielectric liquids in a cylindrical annulus under parabolic flight conditions}, series = {Abstract booklet for the International Conference on Rayleigh B{\´e}nard Turbulence, May 14-18, 2018, Enschede, NL}, booktitle = {Abstract booklet for the International Conference on Rayleigh B{\´e}nard Turbulence, May 14-18, 2018, Enschede, NL}, pages = {S. 20}, language = {en} } @inproceedings{HasanuzzamanMerboldMotuzetal., author = {Hasanuzzaman, Gazi and Merbold, Sebastian and Motuz, Vasyl and Egbers, Christoph and Cuvier, Christophe and Foucaut, Jean-Marc}, title = {Experimental investigation of active control in turbulent boundary layer using uniform blowing}, series = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, booktitle = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, editor = {K{\"a}hler, Christian J. and Hain, Rainer and Scharnowski, Sven and Fuchs, Thomas}, publisher = {Institute of Fluid Mechanics and Aerodynamics, Universit{\"a}t der Bundeswehr}, address = {Neubiberg}, isbn = {978-3-943207-32-3}, pages = {180 -- 185}, language = {en} } @inproceedings{ZanounMotuzEgbersetal., author = {Zanoun, El-Sayed and Motuz, Vasyl and Egbers, Christoph and Keller, J. and D{\"o}rner, K.}, title = {Stereoscopic-PIV and Hot Wire Measurements in Pipe Flow at Relatively High}, series = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, booktitle = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, editor = {K{\"a}hler, Christian J. and Hain, Rainer and Scharnowski, Sven and Fuchs, Thomas}, publisher = {Institute of Fluid Mechanics and Aerodynamics, Universit{\"a}t der Bundeswehr}, address = {Neubiberg}, isbn = {978-3-943207-32-3}, doi = {10.18726/2018_2}, pages = {877 -- 882}, language = {en} } @inproceedings{MerboldFroitzheimEgbers, author = {Merbold, Sebastian and Froitzheim, Andreas and Egbers, Christoph}, title = {Torque in turbulent Taylor-Couette flow for small radius ratios}, series = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, booktitle = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, editor = {K{\"a}hler, Christian J. and Hain, Rainer and Scharnowski, Sven and Fuchs, Thomas}, publisher = {Institute of Fluid Mechanics and Aerodynamics, Universit{\"a}t der Bundeswehr}, address = {Neubiberg}, isbn = {978-3-943207-32-3}, doi = {10.18726/2018_2}, pages = {598 -- 602}, language = {en} } @misc{KupkaZaussingerMontgomery, author = {Kupka, Friedrich and Zaussinger, Florian and Montgomery, M. H.}, title = {Mixing and overshooting in surface convection zones of DA white dwarfs: First results from ANTARES}, series = {Monthly Notices of the Royal Astronomical Society}, volume = {474}, journal = {Monthly Notices of the Royal Astronomical Society}, number = {4}, issn = {1365-2966}, pages = {4660 -- 4671}, language = {en} } @misc{Zaussinger, author = {Zaussinger, Florian}, title = {A dynamic beam model for the motility of Listeria monocytogenes}, series = {Acta Mechanica}, volume = {229}, journal = {Acta Mechanica}, number = {12}, issn = {1619-6937}, doi = {10.1007/s00707-018-2277-1}, pages = {4927 -- 4944}, language = {en} } @inproceedings{EgbersZaussingerHaunetal., author = {Egbers, Christoph and Zaussinger, Florian and Haun, Peter and Canfield, Peter and Travnikov, Vadim and Froitzheim, Andreas}, title = {Convection in the spherical gap under micro-gravity conditions: From Earth's mantle to atmospheric flows}, series = {Book of Abstracts, 20th International Couette Taylor Workshop, July 11 - 13th, 2018 Marseille France}, booktitle = {Book of Abstracts, 20th International Couette Taylor Workshop, July 11 - 13th, 2018 Marseille France}, pages = {30 -- 31}, language = {en} } @misc{SeeligMeyerGerstneretal., author = {Seelig, Torsten and Meyer, Antoine and Gerstner, Philipp and Meier, Martin and Jongmanns, Marcel and Baumann, Martin and Heuveline, Vincent and Egbers, Christoph}, title = {Dielectrophoretic force-driven convection in annular geometry under Earth's gravity}, series = {International Journal of Heat and Mass Transfer}, volume = {139}, journal = {International Journal of Heat and Mass Transfer}, issn = {0017-9310}, doi = {10.1016/j.ijheatmasstransfer.2019.04.068}, pages = {386 -- 398}, language = {en} } @misc{SesterhennShahirpour, author = {Sesterhenn, J{\"o}rn and Shahirpour, Amir}, title = {A characteristic dynamic mode decomposition}, series = {Theoretical and computational fluid dynamics}, volume = {33}, journal = {Theoretical and computational fluid dynamics}, number = {3-4}, issn = {1432-2250}, doi = {10.1007/s00162-019-00494-y}, pages = {281 -- 305}, language = {en} } @misc{HarlanderBorciaKrebs, author = {Harlander, Uwe and Borcia, Ion-Dan and Krebs, Andreas}, title = {Nonnormality increases variance of gravity waves trapped in a tilted box}, series = {Geophysical \& Astrophysical Fluid Dynamics}, volume = {113}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, number = {5/6}, issn = {1029-041}, doi = {10.1080/03091929.2018.1549660}, pages = {602 -- 622}, language = {en} } @misc{GhasemiKleinWilletal., author = {Ghasemi, Abouzar and Klein, Marten and Will, Andreas and Harlander, Uwe}, title = {Mean flow generation by an intermittently unstable boundary layer over a sloping wall}, series = {Journal of Fluid Mechanics}, journal = {Journal of Fluid Mechanics}, number = {vol. 853}, issn = {1750-6859}, doi = {10.1017/jfm.2018.552}, pages = {111 -- 149}, language = {en} } @misc{LarcherViazzoHarlanderetal., author = {Larcher, Thomas von and Viazzo, Stephane and Harlander, Uwe and Vincze, Miklos}, title = {Instabilities and small-scale waves within the Stewartson layers of a thermally driven rotating annulus}, series = {Journal of Fluid Mechanics}, journal = {Journal of Fluid Mechanics}, number = {vol. 841}, issn = {1750-6859}, doi = {10.1017/jfm.2018.10}, pages = {380 -- 407}, language = {en} } @misc{BorciaBorciaBestehornetal., author = {Borcia, Ion-Dan and Borcia, Rodica and Bestehorn, Michael and Richter, Stefan and Xu, Wenchao and Harlander, Uwe}, title = {Horizontal Faraday instability and parametric excitation in a circular channel}, series = {GAMM 2019, 90th Annual Meeting of the International Assoociation of Applied Mathematics and Mechanics, February 18-22, 2019, Vienna, Austria}, journal = {GAMM 2019, 90th Annual Meeting of the International Assoociation of Applied Mathematics and Mechanics, February 18-22, 2019, Vienna, Austria}, publisher = {TU Verlag}, address = {Wien}, isbn = {978-3-903024-84-7}, pages = {338}, language = {en} } @misc{ZanounEgbersOerlietal., author = {Zanoun, El-Sayed and Egbers, Christoph and {\"O}rli, Ramis and Fiorini, Tommaso and Bellani, Gabriele and Talamelli, Alessandro}, title = {Experimental evaluation of the mean momentum and kinetic energy balance equations in turbulent pipe flows at high Reynolds number}, series = {Journal of Turbulence}, volume = {20}, journal = {Journal of Turbulence}, number = {5}, issn = {1468-5248}, doi = {10.1080/14685248.2019.1628968}, pages = {285 -- 299}, language = {en} } @misc{FroitzheimEzetaHuismanetal., author = {Froitzheim, Andreas and Ezeta, Rodrigo and Huisman, Sander G. and Merbold, Sebastian and Sun, Chao and Lohse, Detlef and Egbers, Christoph}, title = {Statistics, plumes and azimuthally travelling waves in ultimate Taylor-Couette turbulent vortices}, series = {Journal of Fluid Mechanics}, volume = {Volume 876}, journal = {Journal of Fluid Mechanics}, issn = {1469-7645}, doi = {10.1017/jfm.2019.552}, pages = {733 -- 765}, language = {en} } @misc{FroitzheimMerboldOstillaMonicoetal., author = {Froitzheim, Andreas and Merbold, Sebastian and Ostilla-M{\´o}nico, Rodolfo and Egbers, Christoph}, title = {Angular momentum transport and flow organization in Taylor-Couette flow at radius ratio of η=0.357"}, series = {Physical Review Fluids}, volume = {4}, journal = {Physical Review Fluids}, doi = {10.1103/PhysRevFluids.4.084605}, pages = {20}, language = {en} } @phdthesis{Merbold, author = {Merbold, Sebastian}, title = {Experimental investigation on turbulent transport in Taylor-Couette flow}, edition = {1. Auflage}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7068-7}, pages = {xxviii, 173}, language = {en} } @phdthesis{Froitzheim, author = {Froitzheim, Andreas}, title = {Angular momentum transport and pattern formation in medium- and wide-gap turbulent Taylor-Couette flow : an experimental study}, edition = {1. Auflage}, publisher = {Cuvilier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7073-1}, pages = {xxiii, 144}, language = {en} } @phdthesis{Neben, author = {Neben, Matthias}, title = {3D-CFD der Gas-Partikel-Str{\"o}mung in einer Laval-D{\"u}se zur Vorhersage mechanischer Erosion}, address = {Cottbus}, pages = {138}, language = {de} } @misc{ZaussingerCanfieldFroitzheimetal., author = {Zaussinger, Florian and Canfield, Peter and Froitzheim, Andreas and Travnikov, Vadim and Haun, Peter and Meier, Martin and Meyer, Antoine and Heintzmann, Pascal and Driebe, Thomas and Egbers, Christoph}, title = {AtmoFlow - Investigation of Atmospheric-Like Fluid Flows Under Microgravity Conditions}, series = {Microgravity Science and Technology : An International Journal for Microgravity and Space Exploration Related Research}, journal = {Microgravity Science and Technology : An International Journal for Microgravity and Space Exploration Related Research}, publisher = {Springer}, issn = {0938-0108}, doi = {10.1007/s12217-019-09717-7}, pages = {1 -- 19}, language = {en} } @misc{MeyerMeierJongmannsetal., author = {Meyer, Antoine and Meier, Martin and Jongmanns, Marcel and Seelig, Torsten and Egbers, Christoph and Mutabazi, Innocent}, title = {Effect of the Initial Conditions on the Growth of Thermoelectric Instabilities During Parabolic}, series = {Microgravity Science and Technology}, volume = {31}, journal = {Microgravity Science and Technology}, number = {5}, issn = {1875-0494}, doi = {10.1007/s12217-019-09755-1}, pages = {715 -- 721}, language = {en} } @phdthesis{Jongmanns, author = {Jongmanns, Marcel}, title = {Flow control of thermal convection using thermo electro hydrodynamic forces in a cylindrical annulus}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7044-1}, pages = {x, 160}, language = {en} } @misc{MeyerSeeligGerstneretal., author = {Meyer, Antoine and Seelig, Torsten and Gerstner, Philipp and Kang, Changwoo and Meier, Martin and Jongmanns, Marcel and Baumann, Martin and Mutabazi, Innocent and Heuveline, Vincent and Egbers, Christoph}, title = {Thermo-electro-hydrodynamic instability of a dielectric fluid in a vertical cylindrical annulus: Earth's gravity and weightless conditions}, series = {LIA-ISTROF workshop 2019 Instabilities and Turbulence in Stratified Rotational Flows Cottbus, 19th-20th June 2019 Brandenburg}, journal = {LIA-ISTROF workshop 2019 Instabilities and Turbulence in Stratified Rotational Flows Cottbus, 19th-20th June 2019 Brandenburg}, address = {Cottbus}, pages = {1}, language = {en} } @misc{MeyerSeeligGerstneretal., author = {Meyer, Antoine and Seelig, Torsten and Gerstner, Philipp and Kang, Changwoo and Meier, Martin and Jongmanns, Marcel and Baumann, Martin and Mutabazi, Innocent and Heuveline, Vincent and Egbers, Christoph}, title = {Thermoelectric instability in a vertical cylindrical annulus}, series = {8th International Symposium on Bifurcations and Instabilities in Fluid Dynamics (BIFD), 16-19 July, 2019, University of Limerick, Ireland}, journal = {8th International Symposium on Bifurcations and Instabilities in Fluid Dynamics (BIFD), 16-19 July, 2019, University of Limerick, Ireland}, address = {Limerick}, pages = {1}, language = {en} } @misc{MeyerSeeligMeieretal., author = {Meyer, Antoine and Seelig, Torsten and Meier, Martin and Mutabazi, Innocent and Egbers, Christoph}, title = {Thermo-electro-hydrodynamic instability of a dielectric fluid in a vertical cylindrical annulus: Earth's gravity and weightless conditions}, series = {26th European Low Gravity Research Association Biennial Symposium and General Assembly, Granada (Spanien), September 24-27, 2019}, journal = {26th European Low Gravity Research Association Biennial Symposium and General Assembly, Granada (Spanien), September 24-27, 2019}, pages = {115 -- 116}, language = {en} } @misc{MeierMeyerMutabazietal., author = {Meier, Martin and Meyer, Antoine and Mutabazi, Innocent and Egbers, Christoph}, title = {Microgravity experiments on thermo-electric flows}, series = {26th European Low Gravity Research Association Biennial Symposium and General Assembly, Granada (Spanien), September 24-27, 2019}, journal = {26th European Low Gravity Research Association Biennial Symposium and General Assembly, Granada (Spanien), September 24-27, 2019}, pages = {293 -- 294}, language = {en} } @misc{RoddaHienAchatzetal., author = {Rodda, Costanza and Hien, Steffen and Achatz, Ulrich and Borcia, Ion-Dan and Le Gal, Patrice and Vincze, Miklos and Harlander, Uwe}, title = {Differentially heated rotating annulus experiments to study gravity wave emission from jets and fronts}, series = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, journal = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, address = {Turin}, pages = {1}, language = {en} } @misc{HarlanderLeGalBorciaetal., author = {Harlander, Uwe and Le Gal, Patrice and Borcia, Ion-Dan and Le Diz{\`e}s, St{\´e}phane and Chen, Jun and Favier, Benjamin}, title = {The linear instability of the stratified plane Poiseuille flow}, series = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, journal = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, address = {Turin}, pages = {1}, language = {en} } @misc{ZaussingerEgbersTravnikovetal., author = {Zaussinger, Florian and Egbers, Christoph and Travnikov, Vadim and Haun, Peter}, title = {Influence of internal heating on convection in the rotating spherical gap}, series = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, journal = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, address = {Turin}, pages = {1}, language = {en} } @misc{XuHarlander, author = {Xu, Wenchao and Harlander, Uwe}, title = {Mean flow generation in rotating annulus with stochastic methods}, series = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, journal = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, address = {Turin}, pages = {1}, language = {en} } @incollection{YousryMerboldEgbers, author = {Yousry, Mohamed and Merbold, Sebastian and Egbers, Christoph}, title = {Influence of convex structured surfaces on turbulent channel flow at different channel heights}, series = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, booktitle = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, editor = {Delgado, Antonio}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-6-4}, pages = {5.1 -- 5.9}, language = {en} } @misc{BorciaBorciaXuetal., author = {Borcia, Ion-Dan and Borcia, Rodica and Xu, Wenchao and Bestehorn, Michael and Richter, Sebastian and Harlander, Uwe}, title = {Undular bores in a large circular channel}, series = {European Journal of Mechanics - B/Fluids}, volume = {79}, journal = {European Journal of Mechanics - B/Fluids}, issn = {0997-7546}, doi = {10.1016/j.euromechflu.2019.09.003}, pages = {67 -- 73}, abstract = {An experimental device previously developed for studying rotating baroclinic flows has been used to investigate undular bores formation, propagation and collision. Up to our knowledge this is the first experimental study of undular bores in a circular channel. For a setup without barriers, this geometry accomplishes in a natural way the periodic lateral boundary conditions, very often used in numerical simulations. An excellent agreement between the experiment and simulation has been achieved. The spatio-temporal structure of bores is well reproduced for the first few reflections or collisions.}, language = {en} } @misc{TravnikovEgbers, author = {Travnikov, Vadim and Egbers, Christoph}, title = {Linear stability analysis of the convective flow in a spherical gap with rotating inner surface}, series = {International Journal of Heat and Mass Transfer}, volume = {148}, journal = {International Journal of Heat and Mass Transfer}, issn = {0017-9310}, doi = {10.1016/j.ijheatmasstransfer.2019.119052}, pages = {10}, language = {en} } @misc{KurganskySeeligKleinetal., author = {Kurgansky, Michael V. and Seelig, Torsten and Klein, Marten and Will, Andreas and Harlander, Uwe}, title = {Mean flow generation due to longitudinal librations of sidewalls of a rotating annulus}, series = {Geophysical \& Astrophysical Fluid Dynamics}, volume = {114}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, number = {6}, issn = {1029-0419}, doi = {10.1080/03091929.2019.1692829}, pages = {762}, abstract = {Laboratory experiments with a rotating cylindrical annulus arereported that reveal a prograde jet, which is adjacent to a (longitu-dinally) librating inner straight cylindrical wall. Here, wall libration isrealised as a time-harmonic modulation of the inner cylinder's rota-tion rate. The outer cylindrical wall and bottom and top lids rotatewith constant angular velocity. The main purpose of our study is tocontribute to a qualitative and quantitative understanding of non-linearities that are present in oscillating, but centrifugally stable,vertical boundary layers frequently encountered in rotating wall-bounded flows. We consider a problem that is in a sense comple-mentary to that of previous works that focused on oscillating Ekmanlayers but neglected the vertical Stokes-Stewartson layers. A sim-ple analytical model is proposed that is able to predict the magni-tude and spatial structure of the emerging prograde near-wall jet interms of nonlinearity inherent in the inner cylinder's boundary layerdynamics.}, language = {en} } @misc{NowakMerboldEgbersetal., author = {Nowak, Torsten and Merbold, Sebastian and Egbers, Christoph and Schacht, Ralph}, title = {Experimentelle Studie mit numerischer Validierung von thermi-schen Kopplungs-Ph{\"a}nomenen mit in Flip-Chip-Technologie aufge-bauten Testchips auf Leiterplatten}, series = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, journal = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, editor = {Delgado, Antonio}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-6-4}, pages = {27.1 -- 27.8}, abstract = {In aktuellen mikro-elektronischen Systemen m{\"u}ssen verschiedene aktive und passive Bauteile auf engstem Raum miteinander auf dem Substrate (bspw. FR4-Leiterplatte) kombiniert werden. Die dabei stetig steigende Leistungsdichte bedarf einer optimierten K{\"u}hlstrategie und der Definition von konduktiven und konvektiven Entw{\"a}rmungspfade, die bereits w{\"a}hrend der Layout-Designphase der Baugruppe ber{\"u}cksichtigt werden sollten. Str{\"o}mungsmechanische Simulationen (CFD) k{\"o}nnen dabei ein erstes Abbild zur Analyse von Kopplungseffekten zwischen den W{\"a}rmequellen und der Umgebung liefern. Diese sind jedoch oft zeitaufwendig und es bedarf zumindest ein gewisses Grundverst{\"a}ndnis, um die Fluid-mechanischen Parameter, das Vernetzen der Geometrien und die gewonnenen Ergebnisse korrekt zu interpretieren. Erste analytische Ans{\"a}tze zur reduzierten Beschreibung von ungeh{\"a}usten Chips auf Leiterplattensubstrat k{\"o}nnen durch thermische Widerstandsnetzwerke abgebildet und durch Aufteilung der W{\"a}rmestr{\"o}me in Richtung Substrat (W{\"a}rmeleitung) und in Richtung des bewegten Fluides (Konvektion) n{\"a}her beschrieben werden.}, language = {de} } @misc{HasanuzzamanMerboldCuvieretal., author = {Hasanuzzaman, Gazi and Merbold, Sebastian and Cuvier, Christophe and Motuz, Vasyl and Foucaut, Jean-Marc and Egbers, Christoph}, title = {Experimental investigation of turbulent boundary layers at high Reynolds number with uniform blowing, part I: statistics}, series = {Journal of Turbulence}, journal = {Journal of Turbulence}, number = {3}, issn = {1468-5248}, doi = {10.1080/14685248.2020.1740239}, pages = {129 -- 165}, abstract = {Uniform blowing in wall bounded shear flows is well known for its drag reducing effects and has long been investigated ever since. However, many contemporary and former research on this topic has confirmed the drag reducing effect but very less is known regarding how blowing is effecting the Reynolds stresses at high Reynolds number. Therefore, effect of uniform blowing has been experimentally investigated using Stereo Particle Image Velocimetry (SPIV) measurements in a zero pressure gradient turbulent boundary layer (TBL). The data presented in this literature covers a large range of high Reynolds number flow e.g. Reθ = 7500∼19763 where Reynolds number is based on the momentum thickness. Upstream blowing was varied from 1\%∼6\% of free stream velocity and measurements were taken downstream after a short interval. Logarithmic and outer region of the TBL was given special attention in terms of investigating statistics and turbulence properties.}, language = {en} } @misc{XuHarlander, author = {Xu, Wenchao and Harlander, Uwe}, title = {Inertial mode interactions in a rotating tilted cylindrical annulus with free surface}, series = {Physical Review Fluids}, volume = {5}, journal = {Physical Review Fluids}, number = {9}, issn = {2469-990X}, doi = {10.1103/PhysRevFluids.5.094801}, pages = {21}, language = {en} } @misc{SzaboZaussingerHaunetal., author = {Szabo, Peter and Zaussinger, Florian and Haun, Peter and Travnikov, Vadim and Meier, Martin and Egbers, Christoph}, title = {Complementary numerical and experimental study in the baroclinic annulus for the microgravity experiment AtmoFlow}, series = {EGU General Assembly 2020, EGU2020-20956, Online | 4-8 May 2020}, journal = {EGU General Assembly 2020, EGU2020-20956, Online | 4-8 May 2020}, doi = {10.5194/egusphere-egu2020-20956}, pages = {2}, language = {en} } @misc{TravnikovZaussingerHaunetal., author = {Travnikov, Vadim and Zaussinger, Florian and Haun, Peter and Egbers, Christoph}, title = {Influence of dielectrical heating on convective flow in a radial force field}, series = {Physical Review E}, volume = {101}, journal = {Physical Review E}, number = {5}, issn = {2470-0053}, doi = {10.1103/PhysRevE.101.053106}, pages = {16}, language = {en} } @misc{ZaussingerHaunSzaboetal., author = {Zaussinger, Florian and Haun, Peter and Szabo, Peter and Travnikov, Vadim and Al-Kawwas, Mustafa and Egbers, Christoph}, title = {Rotating spherical gap convection in the GeoFlow International Space Station (ISS) experiment}, series = {Physical Review Fluids}, volume = {5}, journal = {Physical Review Fluids}, number = {6}, issn = {2469-990X}, doi = {10.1103/PhysRevFluids.5.063502}, pages = {23}, language = {en} } @misc{RoddaHarlander, author = {Rodda, Costanza and Harlander, Uwe}, title = {Transition from Geostrophic Flows to Inertia-Gravity Waves in the Spectrum of a Differentially Heated Rotating Annulus Experiment}, series = {Journal of the Atmospheric Sciences}, volume = {77}, journal = {Journal of the Atmospheric Sciences}, number = {8}, issn = {1520-0469}, doi = {10.1175/JAS-D-20-0033.1}, pages = {2793 -- 2806}, language = {en} } @misc{Harlander, author = {Harlander, Uwe}, title = {Comparison of paradigmatic gravity wave models for ocean and atmosphere}, series = {EGU General Assembly 2020, Online | 4-8 May 2020}, journal = {EGU General Assembly 2020, Online | 4-8 May 2020}, doi = {10.5194/egusphere-egu2020-7222}, language = {en} } @misc{VinczeBozokiHereinetal., author = {Vincze, Miklos and Boz{\´o}ki, Tam{\´a}s and Herein, M{\´a}ty{\´a}s and Borcia, Ion-Dan and Rodda, Costanza and P{\´a}lfy, J{\´o}zsef and Nyerges, Anita and Harlander, Uwe}, title = {Climate impact of the Drake Passage opening: lessons from a minimalistic laboratory experiment}, series = {EGU General Assembly 2020, Online | 4-8 May 2020}, journal = {EGU General Assembly 2020, Online | 4-8 May 2020}, doi = {10.5194/egusphere-egu2020-5004}, language = {en} } @misc{FruehSzaboEgbersetal., author = {Fr{\"u}h, Wolf-Gerrit and Szabo, Peter and Egbers, Christoph and Harlander, Uwe}, title = {Locating sources of variability in the transition to Structural Vacillation in the baroclinic annulus}, series = {EGU General Assembly 2020, Online | 4-8 May 2020}, journal = {EGU General Assembly 2020, Online | 4-8 May 2020}, doi = {10.5194/egusphere-egu2020-7262}, language = {en} } @misc{YoshikawaKangMutabazietal., author = {Yoshikawa, Harunori and Kang, Changwoo and Mutabazi, Innocent and Zaussinger, Florian and Haun, Peter and Egbers, Christoph}, title = {Thermoelectrohydrodynamic convection in parallel plate capacitors under dielectric heating conditions}, series = {Physical review fluids}, volume = {5}, journal = {Physical review fluids}, number = {11}, issn = {2469-990X}, doi = {10.1103/PhysRevFluids.5.113503}, pages = {17}, language = {en} } @misc{ZanounEgbersDewidar, author = {Zanoun, El-Sayed and Egbers, Christoph and Dewidar, Yasser}, title = {Two-Point Velocity Correlations in Fully Developed Turbulent Pipe Flow at Shear Reynolds Number of Reτ ≈ 4000}, series = {Proceedings in Applied Mathematics and Mechanics : (PAMM)}, volume = {20}, journal = {Proceedings in Applied Mathematics and Mechanics : (PAMM)}, number = {1}, issn = {1617-7061}, doi = {10.1002/pamm.202000330}, pages = {4}, language = {en} } @misc{HallolMerboldEgbers, author = {Hallol, Zeinab and Merbold, Sebastian and Egbers, Christoph}, title = {Contribution of Large and Very Large Scale Motions to the Turbulent Kinetic energy in Turbulent Pipe Flow}, series = {Proceedings in applied mathematics and mechanics : PAMM}, volume = {20}, journal = {Proceedings in applied mathematics and mechanics : PAMM}, number = {1}, issn = {1617-7061}, doi = {10.1002/pamm.202000229}, pages = {2}, language = {en} } @misc{RichterZanounEgbers, author = {Richter, Stefan and Zanoun, El-Sayed and Egbers, Christoph}, title = {Investigation of Large Scale Motion Interaction with the Near-Wall Turbulence}, series = {Proceedings in applied mathematics and mechanics : PAMM}, volume = {20}, journal = {Proceedings in applied mathematics and mechanics : PAMM}, number = {1}, issn = {1617-7061}, doi = {10.1002/pamm.202000331}, pages = {2}, language = {en} } @misc{ZanounEgbersNagibetal., author = {Zanoun, El-Sayed and Egbers, Christoph and Nagib, H. M. and Durst, F. and Bellani, Gabriele and Talamelli, Alessandro}, title = {Wall friction relations in wall-bounded shear flows}, series = {European Journal of Mechanics - B/Fluids}, volume = {Vol. 89}, journal = {European Journal of Mechanics - B/Fluids}, issn = {1873-7390}, doi = {10.1016/j.euromechflu.2021.03.007}, pages = {171 -- 179}, language = {en} } @misc{RoddaHarlanderSavaroetal., author = {Rodda, Costanza and Harlander, Uwe and Savaro, C. and Campagne, A. and Calpe Linares, M. and Augier, P. and Sommeria, Joel and Valran, T. and Viboud, Samuel and Mordant, N.}, title = {Can Laboratory experiments help to explain the atmosphere and ocean's energetics?}, series = {Colaborative Research Center TRR 181, Energy transfers in Atmosphere and Oceans, 16th - 18th Mar. 2021, Universit{\"a}t Hamburg, Center for Earth System Research and Sustainability (CEN)}, journal = {Colaborative Research Center TRR 181, Energy transfers in Atmosphere and Oceans, 16th - 18th Mar. 2021, Universit{\"a}t Hamburg, Center for Earth System Research and Sustainability (CEN)}, language = {en} } @misc{SzaboMeierMeyeretal., author = {Szabo, Peter and Meier, Martin and Meyer, Antoine and Barry, Elhadj and Motuz, Vasyl and Mutabazi, Innocent and Egbers, Christoph}, title = {PIV and shadowgraph measurements of thermo-electrohydrodynamic convection in a horizontal aligned differentially heated annulus at different gravity conditions}, series = {Experimental Thermal and Fluid Science}, volume = {129}, journal = {Experimental Thermal and Fluid Science}, issn = {1879-2286}, doi = {10.1016/j.expthermflusci.2021.110470}, language = {en} } @phdthesis{MalteseMelettideOliveira, author = {Maltese Meletti de Oliveira, Gabriel}, title = {High-performance computing and laboratory experiments on strato-rotational instabilities}, address = {Cottbus}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-54408}, pages = {155}, language = {en} } @phdthesis{Xu, author = {Xu, Wenchao}, title = {Experiments on nonlinear waves in homogeneous flows with free upper surface and time-dependent forcing}, address = {Cottbus}, doi = {10.26127/BTUOpen-5386}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-53860}, pages = {148}, language = {en} } @phdthesis{Hallol, author = {Hallol, Zeinab}, title = {Behaviour of energetic coherent structures in turbulent pipe flow at high Reynolds numbers}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7501-9}, pages = {146}, language = {en} } @misc{VinczeBozokiHereinetal., author = {Vincze, Miklos and Boz{\´o}ki, Tam{\´a}s and Herein, M{\´a}ty{\´a}s and Borcia, Ion-Dan and Harlander, Uwe and Horics{\´a}nyi, Attila and Nyerges, Anita and Rodda, Costanza and P{\´a}l, Andr{\´a}s and P{\´a}lfy, J{\´o}zsef}, title = {The Drake Passage opening from an experimental fluid dynamics point of view}, series = {SScientific Reports}, volume = {11}, journal = {SScientific Reports}, issn = {2045-2322}, doi = {10.1038/s41598-021-99123-0}, pages = {11}, language = {en} } @misc{MalteseMelettideOliveiraAbideViazzoetal., author = {Maltese Meletti de Oliveira, Gabriel and Abide, St{\´e}phane and Viazzo, Stephane and Krebs, Andreas and Harlander, Uwe}, title = {Experiments and long-term high-performance computations on amplitude modulations of strato-rotational flows}, series = {Geophysical \& Astrophysical Fluid Dynamics}, volume = {115}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, number = {3}, issn = {1029-0419}, doi = {10.1080/03091929.2020.1795647}, pages = {297 -- 321}, language = {en} } @misc{HarlanderKurgansky, author = {Harlander, Uwe and Kurgansky, Michael V.}, title = {Two-dimensional internal gravity wave beam instability. Linear theory and subcritical instability}, series = {Geophysical \& Astrophysical Fluid Dynamics}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, issn = {1029-0419}, doi = {10.1080/03091929.2021.1943379}, language = {en} } @misc{JohnstonSzaboBennett, author = {Johnston, Ellis and Szabo, Peter and Bennett, Nick}, title = {Cooling silicon photovoltaic cells using finned heat sinks and the effect of inclination angle}, series = {Thermal Science and Engineering Progress}, volume = {Vol. 23}, journal = {Thermal Science and Engineering Progress}, issn = {2451-9049}, doi = {10.1016/j.tsep.2021.100902}, pages = {11}, language = {en} } @incollection{ErdogduSzaboCarteretal., author = {Erdogdu, Ahmed Oguzhan and Szabo, Peter and Carter, R. and Gevre, M.-E. and Haun, Peter and Zaussinger, Florian and Schulze, B. and Meier, Martin and Egbers, Christoph}, title = {Verwendung der Wollaston-Scherinterferometrie zur Untersuchung des Brechungsindexgradienten in einem differentiell beheizten Ringspalt}, series = {Experimentelle Str{\"o}mungsmechanik : 28. Fachtagung, 7.-9. September 2021, Bremen}, booktitle = {Experimentelle Str{\"o}mungsmechanik : 28. Fachtagung, 7.-9. September 2021, Bremen}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-7-1}, pages = {19}, language = {de} } @incollection{MeierSzaboMotuzetal., author = {Meier, Martin and Szabo, Peter and Motuz, Vasyl and Egbers, Christoph}, title = {Str{\"o}mungsfeldvisualisierung von thermo-elektrodynamischer Konvektion mit einer kombinierten PIV- und Schattentechnik}, series = {Experimentelle Str{\"o}mungsmechanik : 28. Fachtagung, 7.-9. September 2021, Bremen}, booktitle = {Experimentelle Str{\"o}mungsmechanik : 28. Fachtagung, 7.-9. September 2021, Bremen}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-7-1}, pages = {6}, language = {de} } @phdthesis{Hasanuzzaman, author = {Hasanuzzaman, Gazi}, title = {Experimental investigation of turbulent boundary layer with uniform blowing at moderate and high Reynolds numbers}, publisher = {BTU}, address = {Cottbus-Senftenberg}, doi = {10.26127/BTUOpen-5566}, pages = {XXIII, 152}, abstract = {Experimental investigation in turbulent boundary layer flows represents one of the canonical geometries of wall bounded shear flows. Utmost relevance of such experiments, however, is applied in the engineering applications in aerospace and marine industries. In particular, continuous effort is being imparted to explore the underlying physics of the flow in order to develop models for numerical tools and to achieve flow control. Within the scope of this Ph. D. topic, application of active control method such as micro-blowing effect in the incompressible, zero pressure gradient turbulent boundary layer was investigated. Turbulent boundary layer flow is particularly interesting as well as challenging due to the presence of different interacting scales which are increasingly becoming significant as the flow inertial conditions keeps growing. Therefore, energy content of the coherent structures in outer layer becomes stronger and necessitates measurements in relatively large Reynolds number. Present control experiments in turbulent boundary layer can be split into two different work segments, where one is objected towards the data measurements in turbulent boundary layer over smooth surface with and without any external perturbation. Here, perturbation is applied in the form of wall normal blowing while keeping the magnitude of blowing very low compared to the free stream velocity. For the subsequent results reported here, magnitude of blowing ratio was varied between 0\%~6\%. In the first part of the present thesis e.g. 0.415×10e+3≤Reτ≤1.160×10e+3, measurements were performed at the Brandenburg University of Technology wind tunnel. Non-intrusive Laser Doppler Anemometry was applied to carry out a series of measurements on a zero pressure gradient flat plate turbulent boundary layer. Blowing ratio through the perforated surface was varied between 0.17\%~1.52\% of the free stream velocity. To a maximum of 50\% reduction in friction drag was achieved. For the measurements on the upper range of the stated Reynolds number, were conducted at the boundary layer wind tunnel. This boundary layer wind tunnel offers a spatially developed turbulent boundary layer over a flat plate within 2.2×10e+3≤Reτ≤5.5×10e+3 with an excellent spatial resolution. With the help of Stereo Particle Image Velocimetry technique, measurement of the velocity components were obtained covering entire boundary layer in streamwise wall normal plane. In addition, time resolved measurements were also obtained in spanwise and wall-normal plane in order to look into the morphology of turbulent structures immediately above the blowing area.}, language = {en} } @misc{LeGalHarlanderBorciaetal., author = {Le Gal, Patrice and Harlander, Uwe and Borcia, Ion-Dan and Le Diz{\`e}s, St{\´e}phane and Chen, J. and Favier, Benjamin}, title = {Instability of vertically stratified horizontal plane Poiseuille flow}, series = {Journal of Fluid Mechanics}, volume = {907}, journal = {Journal of Fluid Mechanics}, number = {R1}, issn = {1469-7645}, doi = {10.1017/jfm.2020.917}, pages = {1 -- 14}, language = {en} } @misc{HallolYousryMerboldetal., author = {Hallol, Zeinab and Yousry, Mohamed and Merbold, Sebastian and Egbers, Christoph}, title = {Time-resolved PIV measurements in fully developed turbulent pipe flow}, series = {25th International Congress of Theoretical and Applied Mechanics Milan (Italy), 22-27 August 2021}, journal = {25th International Congress of Theoretical and Applied Mechanics Milan (Italy), 22-27 August 2021}, isbn = {978-83-65550-31-6}, pages = {1374 -- 1375}, language = {en} } @misc{SzaboMeyerMeieretal., author = {Szabo, Peter and Meyer, Antoine and Meier, Martin and Motuz, Vasyl and Sliavin, Yaraslau and Egbers, Christoph}, title = {Simultaneous PIV and shadowgraph measurements of thermo-electrohydrodynamic convection in a differentially heated annulus}, series = {Technisches Messen}, volume = {89}, journal = {Technisches Messen}, number = {3}, issn = {2196-7113}, doi = {10.1515/teme-2021-0120}, pages = {148 -- 157}, language = {en} } @misc{HallolYousryMerboldetal., author = {Hallol, Zeinab and Yousry, Mohamed and Merbold, Sebastian and Egbers, Christoph}, title = {Effect of High Reynolds Number on the Behaviour of Large and Very Large Scale Motions in Fully Developed Turbulent Pipe Flow}, series = {Fluid Dynamics}, volume = {57}, journal = {Fluid Dynamics}, number = {4}, issn = {0015-4628}, doi = {10.1134/S0015462822040048}, pages = {524 -- 537}, language = {en} } @misc{HasanuzzamanMerboldMotuzetal., author = {Hasanuzzaman, Gazi and Merbold, Sebastian and Motuz, Vasyl and Egbers, Christoph}, title = {Enhanced outer peaks in turbulent boundary layer using uniform blowing at moderate Reynolds number}, series = {Journal of Turbulence}, volume = {23}, journal = {Journal of Turbulence}, number = {1-2}, issn = {1468-5248}, doi = {10.1080/14685248.2021.2014058}, pages = {68 -- 95}, language = {en} } @misc{HallolYousryMerboldetal., author = {Hallol, Zeinab and Yousry, Mohamed and Merbold, Sebastian and Egbers, Christoph}, title = {Experimental investigation to study energetic structures in pipe flow at high Reynolds numbers using POD analysis}, series = {Journal of the Physical Society of Japan}, volume = {91}, journal = {Journal of the Physical Society of Japan}, number = {9}, issn = {0031-9015}, doi = {10.7566/JPSJ.91.094401}, pages = {1 -- 10}, language = {en} } @misc{HarlanderBorciaVinczeetal., author = {Harlander, Uwe and Borcia, Ion-Dan and Vincze, Miklos and Rodda, Costanza}, title = {Probability Distribution of Extreme Events in a Baroclinic Wave Laboratory Experiment}, series = {Fluids}, volume = {7}, journal = {Fluids}, number = {8}, issn = {2311-5521}, doi = {10.3390/fluids7080274}, abstract = {Atmospheric westerly jet streams are driven by temperature differences between low and high latitudes and the rotation of the Earth. Meandering jet streams and propagating Rossby waves are responsible for the variable weather in the mid-latitudes. Moreover, extreme weather events such as heat waves and cold spells are part of the jet stream dynamics. For many years, a simple analog in the form of a simplified laboratory experiment, the differentially heated rotating annulus, has provided insight into the dynamics of the meandering jet stream. In the present study, probability density distributions of extreme events from a long-term laboratory experiment are studied and compared to the atmospheric probability density distributions. Empirical distributions of extreme value monthly block data are derived for the experimental and atmospheric cases. Generalized extreme value distributions are adjusted to the empirical distributions, and the distribution parameters are compared. Good agreement was found, but the distributions of the experimental data showed a shift toward larger extreme values, and some explanations for this shift are suggested. The results indicate that the laboratory model might be a useful tool for investigating changes in extreme event distributions due to climate change. In the laboratory context, the change can be modeled by an increase in total temperature accompanied by a reduction in the radial heat contrast.}, language = {en} } @misc{RoddaHarlanderVincze, author = {Rodda, Costanza and Harlander, Uwe and Vincze, Miklos}, title = {Jet stream variability in a polar warming scenario - a laboratory perspective}, series = {Weather and Climate Dynamics}, volume = {3}, journal = {Weather and Climate Dynamics}, number = {3}, issn = {2698-4016}, doi = {10.5194/wcd-3-937-2022}, pages = {937 -- 950}, language = {en} } @incollection{SliavinSzaboFruehetal., author = {Sliavin, Yaraslau and Szabo, Peter and Fr{\"u}h, Wolf-Gerrit and Schulze, Bj{\"o}rn and Egbers, Christoph}, title = {Utilizing infrared thermography to investigate baroclinic instability in the differentially heated rotating annulus}, series = {GALA-Fachtagung "Experimentelle Str{\"o}mungsmechanik", 6.- 8. September 2022, Ilmenau}, booktitle = {GALA-Fachtagung "Experimentelle Str{\"o}mungsmechanik", 6.- 8. September 2022, Ilmenau}, doi = {10.13140/RG.2.2.32413.59360}, pages = {49.1 -- 49.8}, language = {en} } @incollection{StrangfeldBoeluekSzaboetal., author = {Strangfeld, Matthias and B{\"o}l{\"u}k, Oguzhan and Szabo, Peter and Meier, Martin and Meyer, Antoine and Sliavin, Yaraslau and Motuz, Vasyl and Egbers, Christoph}, title = {Thermo-electrohydrodynamic convection in a dielectric fluid layer with volumetric heating}, series = {GALA-Fachtagung "Experimentelle Str{\"o}mungsmechanik", 6.- 8. September 2022, Ilmenau}, booktitle = {GALA-Fachtagung "Experimentelle Str{\"o}mungsmechanik", 6.- 8. September 2022, Ilmenau}, pages = {43.1 -- 43.8}, language = {en} } @misc{SzaboGaillardHaunetal., author = {Szabo, Peter and Gaillard, Yann and Haun, P. and Carter, R. and Adrian, A. and Sliavin, Yaraslau and Zaussinger, Florian and Egbers, Christoph}, title = {AtmoFlow - Investigating large scale convection in planetary atmospheres}, series = {27th European Low Gravity Research Association Biennial Symposium and General}, journal = {27th European Low Gravity Research Association Biennial Symposium and General}, pages = {92 -- 93}, language = {en} } @misc{MeierMeyerMotuzetal., author = {Meier, M. and Meyer, Antoine and Motuz, Vasyl and Sliavin, Yaraslau and Bista, T. R. and Strangfeld, Matthias and Szabo, Peter and Egbers, Christoph}, title = {Dielectrophoretic induced convection in a sounding rocket flight}, series = {Tagung: 27th European Low Gravity Research Association Biennial Symposium and General}, journal = {Tagung: 27th European Low Gravity Research Association Biennial Symposium and General}, pages = {37}, language = {en} } @misc{MeyerMeierSzaboetal., author = {Meyer, Antoine and Meier, Martin and Szabo, Peter and Sliavin, Yaraslau and Egbers, Christoph and Gerstner, Philipp and Motuz, Vasyl and Roller, Jonas and Heuveline, Vincent}, title = {Stability of a dielectric liquid confined in a differentially heated vertical Taylor-Couette system with applied radial electric field}, series = {International Symposium on Bifurcations and Instabilities in Fluid Dynamics}, journal = {International Symposium on Bifurcations and Instabilities in Fluid Dynamics}, pages = {23}, language = {en} } @misc{SzaboGaillardEgbers, author = {Szabo, Peter and Gaillard, Yann and Egbers, Christoph}, title = {Thermo-electrohydrodynamic (TEHD) convection in rotating spherical gap: A 2D-numerical simulation of the AtmoFlow sphere}, series = {European Fluid Mechanics Conference EFMC14}, journal = {European Fluid Mechanics Conference EFMC14}, pages = {37}, language = {en} } @misc{SzaboFrueh, author = {Szabo, Peter and Fr{\"u}h, Wolf-Gerrit}, title = {Effect of intrinsic thermomagnetic convective timescales on the response to periodic modulation of external forcing parameters}, series = {European Fluid Mechanics Conference EFMC14}, journal = {European Fluid Mechanics Conference EFMC14}, pages = {35}, language = {en} } @misc{MeyerMeierSzaboetal., author = {Meyer, Antoine and Meier, M. and Szabo, Peter and Sliavin, Yaraslau and Motuz, Vasyl and Gerstner, Philipp and Roller, Jonas and Heuveline, Vincent and Egbers, Christoph}, title = {Thermoelectric instability of a dielectric fluid in a cylindrical annulus with vertical or horizontal orientation}, series = {European Fluid Mechanics Conference EFMC14}, journal = {European Fluid Mechanics Conference EFMC14}, pages = {37}, language = {en} } @misc{HasanuzzamanEivaziMerboldetal., author = {Hasanuzzaman, Gazi and Eivazi, Hamidreza and Merbold, Sebastian and Egbers, Christoph and Vinuesa, Ricardo}, title = {Enhancement of PIV measurements via physics-informed neural networks}, series = {Measurement Science and Technology}, journal = {Measurement Science and Technology}, issn = {1361-6501}, doi = {10.1088/1361-6501/aca9eb}, language = {en} } @misc{MeyerYoshikawaSzaboetal., author = {Meyer, Antoine and Yoshikawa, Harunori and Szabo, Peter and Meier, Martin and Egbers, Christoph and Mutabazi, Innocent}, title = {Thermoelectric instabilities in a circular Couette flow}, series = {Philosophical transactions of the Royal Society. Series A, Mathematical, physical and engineering sciences}, volume = {381}, journal = {Philosophical transactions of the Royal Society. Series A, Mathematical, physical and engineering sciences}, number = {2243}, issn = {1471-2962}, doi = {10.1098/rsta.2022.0139}, language = {en} } @misc{MeyerMeierMotuzetal., author = {Meyer, Antoine and Meier, Martin and Motuz, Vasyl and Egbers, Christoph}, title = {Thermo-electric convection in a cylindrical annulus during a sounding rocket flight}, series = {Journal of Fluid Mechanics}, volume = {972}, journal = {Journal of Fluid Mechanics}, number = {A26}, issn = {0022-1120}, doi = {10.1017/jfm.2023.677}, language = {en} } @misc{PanahandehMayGrosseKockertetal., author = {Panahandeh, Sara and May, Daniel and Grosse-Kockert, Corina and Schacht, Ralph and Abo Ras, Mohamad and Wunderle, Bernhard}, title = {Pulsed infrared thermal imaging as inline quality assessment tool}, series = {Microelectronics Reliability}, volume = {2023}, journal = {Microelectronics Reliability}, number = {Volume 142}, issn = {0026-2714}, doi = {10.1016/j.microrel.2023.114910}, pages = {1 -- 11}, abstract = {Pulsed infrared thermography (PIRT) is a very fast and non-destructive technique for testing various types of specimens. This makes PIRT interesting for 100 \%-inspections in industrial production lines. Especially for the die attach interface inspection of sintered and soldered electronic components and layer-to-layer interfaces in fiber-reinforced plastic (FRP), the industry is looking for alternatives to cost intensive X-ray methods and the time-consuming scanning acoustic microscopy (C-SAM). A big challenge to use the PIRT technology for inspections in industrial production lines is the low emissivity of the surface of the device under test (DUT). This work will present a PIRT system including a vacuum foil lamination setup to avoid the necessary spray coating of DUTs with low emissivity surfaces in failure analyses. This system can be used as inline quality assessment tool with an integrated technique to perform reliable component inspections on a wide range of different specimens.}, language = {en} } @misc{BourasFellahBarilleetal., author = {Bouras, Dikra and Fellah, Mamoun and Barille, Regis and Obrosov, Aleksei and El-Hiti, Gamal A.}, title = {Production of novel Zr-Mg nanoceramics based on kaolinite clay with strong antibacterial activity}, series = {Ceramics International}, volume = {50}, journal = {Ceramics International}, number = {16}, publisher = {Elsevier}, issn = {1873-3956}, doi = {https://doi.org/10.1016/j.ceramint.2024.05.091}, pages = {27949 -- 27960}, abstract = {Gram-negative bacteria Pseudomonas putida, Gram-positive Bacillus subtilis, and Staphylococcus aureus were utilized as test samples to evaluate the antibacterial characteristics of DD3-clay/MgO and DD3+38 wt\% ZrO2-clay/MgO nanoparticles. The ceramic powders prepared by a thermal autoclave method are characterized before and after Mg addition by SEM, EDX, XRD, IR, UV-visible, and TEM in order to investigate microstructure, phase, and surface morphology. The results showed that after adding Mg, it led to the deformation of the crystal lattices of (mullite, zirconium silicate, and zirconium oxide) together with a decrease in particle size (75-103 nm) and a complete change in its shape from nanotube to nanospherical, as observed by SEM and TEM analyses. It also confirmed by UV-visible spectroscopy that the addition of Mg increases the absorbance accompanying a decrease in the energy gap of 1.91, 1.74, 1.73, and 1.43 eV corresponding to DD3, DD3Z, DD3/30 wt\% Mg and DD3Z/30 wt\% Mg respectively. The antibacterial mechanism is related to the size of the particles, the solvent used for powder dissolution, the nanoparticle's size when they come into touch with bacteria, and the generation of reactive oxygen species (ROS: ˙O2-, ˙OH, and H2O2). It was observed that the anti-bacterial activity is enhanced with 10 wt\% and 30 wt\% of Mg added to a modified ceramic powder. Also, more O2- is formed on the surface of the prepared powder, which penetrates the bacterial cell and destroys it. The nanocomposite particles showed remarkable antibacterial activity when they were dissolved in DMSO compared to methanol and chloroform as organic solvents. The aim is to enrich knowledge on the antibacterial activities of metal nanoparticles (ZrSiO4 and MgO) on three bacterial strains with different Grams due to their extensive involvement in the phenomena of contamination and infection encountered in the medical field. The synthesized nanoparticles have good antimicrobial activity against all strains tested. A maximum inhibition zone of 35 ± 0.2 mm was obtained with S. aureus, a zone of 23 ± 0.46 mm with P. putida and a zone of 27 ± 0.46 nm with B. subtilis for DD3/30 wt\% Mg and an inhibition zone of 38 ± 0.93 mm, 26 ± 0.24 nm and 17 ± 0.33 nm was obtained with same strains for DD3Z/30 wt\% Mg, respectively.}, language = {en} } @misc{GaillardSzaboTravnikovetal., author = {Gaillard, Yann and Szabo, Peter and Travnikov, Vadim and Egbers, Christoph}, title = {Modelling Thermo-Electrohydrodynamic Convection in Rotating Spherical Shell Using OpenFOAM ®}, series = {OpenFOAM® Journal}, volume = {5 (2025)}, journal = {OpenFOAM® Journal}, doi = {10.51560/ofj.v5.136}, pages = {1 -- 16}, language = {en} } @misc{HamedeRollerMeyeretal., author = {Hamede, Mohammed Hussein and Roller, Jonas and Meyer, Antoine and Heauveline, Vincent and Egbers, Christoph}, title = {Dielectrophoretic force-enhanced thermal convection within a horizontal cylindrical annulus}, series = {Physics of Fluids}, volume = {36}, journal = {Physics of Fluids}, number = {12}, publisher = {AIP Publishing}, doi = {10.1063/5.0234772}, pages = {1 -- 14}, language = {en} } @misc{HasanuzzamanEgbers, author = {Hasanuzzaman, Gazi and Egbers, Christoph}, title = {Flow control of a turbulent boundary layer using uniform blowing}, series = {Progress in Turbulence X : Proceedings of the iTi Conference on Turbulence 2023}, journal = {Progress in Turbulence X : Proceedings of the iTi Conference on Turbulence 2023}, isbn = {978-3-031-55924-2}, doi = {10.1007/978-3-031-55924-2_36}, language = {en} } @misc{BorciaRichterBorciaetal., author = {Borcia, Ion-Dan and Richter, Sebastian and Borcia, Rodica and Sch{\"o}n, Franz-Theo and Harlander, Uwe and Bestehorn, Michael}, title = {Wave propagation in a circular channel: sloshing and resonance}, series = {The European Physical Journal Special Topics}, volume = {Vol. 232}, journal = {The European Physical Journal Special Topics}, number = {4}, issn = {1951-6401}, doi = {10.1140/epjs/s11734-023-00790-z}, pages = {461 -- 468}, abstract = {Surface wave resonance of a liquid (water) layer confined in a circular channel is studied both experimentally and numerically. For the experiment, eight unevenly distributed ultrasonic distance sensors measure the local height of the wave surface. The resonance curves show maxima only for odd multiples of the fundamental resonance frequency . We explained this behavior using a simple intuitive "ping-pong" like model. Collision of wave fronts can be observed for higher frequencies. Also, the wave reflection on the walls can be treated as wave collision with itself. The non-linearity seems to be weak in our study so the delay in the wave propagation before and after the collision is small. Time-space plots show localized propagating waves with high amplitudes for frequencies near resonance. Between the peaks low amplitude and harmonic patterns are observed. However, for higher frequencies, the frequency band for localized waves becomes wider. In the Fourier space-time plane, this can be observed as a point for the harmonic patterns or a superposition of two lines: one line parallel to wave-vector k axis corresponding to the excitation frequency and a second line with inclination given by wave propagation velocity . For planned future work, this result will help us to reconstruct the whole water surface elevation using time-series from only a few measurement points}, language = {en} } @misc{SchoenBestehorn, author = {Sch{\"o}n, Franz-Theo and Bestehorn, Michael}, title = {Instabilities and pattern formation in viscoelastic fluids}, series = {The European Physical Journal Special Topics}, volume = {Vol. 232}, journal = {The European Physical Journal Special Topics}, number = {4}, issn = {1951-6401}, doi = {10.1140/epjs/s11734-023-00792-x}, pages = {375 -- 383}, language = {en} } @incollection{MerboldHasanuzzamanBuchwaldetal., author = {Merbold, Sebastian and Hasanuzzaman, Gazi and Buchwald, Tom and Schunk, Christoph and Schmeling, Daniel and Volkmann, Andr{\´e} and Brinkema, Robert and Hampel, Uwe and Schr{\"o}der, Andreas and Egbers, Christoph}, title = {Reference experiment for aerosol particle transport for dynamic situations}, series = {Experimentelle Str{\"o}mungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau}, booktitle = {Experimentelle Str{\"o}mungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau}, editor = {Cierpka, Christian}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-8-8}, pages = {8}, language = {en} } @incollection{HamedeMerboldEgbers, author = {Hamede, Mohammed Hussein and Merbold, Sebastian and Egbers, Christoph}, title = {Formation of flow patterns in a counter-rotating very wide gap Taylor-Couette flow (η = 0.1)}, series = {Experimentelle Str{\"o}mungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau}, booktitle = {Experimentelle Str{\"o}mungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-8-8}, pages = {8}, language = {en} } @incollection{MerboldKumarEgbers, author = {Merbold, Sebastian and Kumar, Chandana B.V. and Egbers, Christoph}, title = {Transparent water tunnel for educational purpose of fundamental flow phenomena and Laser-optical measurement techniques}, series = {Experimentelle Str{\"o}mungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau}, booktitle = {Experimentelle Str{\"o}mungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-8-8}, pages = {8}, language = {en} } @phdthesis{Rodda, author = {Rodda, Costanza}, title = {Gravity wave emission from jet systems in the differentially heated rotating annulus experiment}, edition = {1. Auflage}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7110-3}, pages = {xvi, 180}, language = {en} } @misc{HamedeMerboldEgbers, author = {Hamede, Mohammed Hussein and Merbold, Sebastian and Egbers, Christoph}, title = {Transition to the ultimate turbulent regime in a very wide gap Taylor-Couette flow (η = 0.1) with a stationary outer cylinder}, series = {EPL (Europhysics Letters)}, volume = {143}, journal = {EPL (Europhysics Letters)}, number = {2}, issn = {1286-4854}, doi = {10.1209/0295-5075/acdea1}, language = {en} } @misc{RichterZanounPeixinhoetal., author = {Richter, Stefan and Zanoun, El-Sayed and Peixinho, Jorge and Egbers, Christoph}, title = {Pipe Flow Development and Transition in CoSmaPipe Facility}, series = {Proceedings in applied mathematics and mechanics : PAMM}, volume = {23}, journal = {Proceedings in applied mathematics and mechanics : PAMM}, number = {1}, issn = {1617-7061}, doi = {10.1002/pamm.202300001}, language = {en} } @misc{BarryYoshikawaKangetal., author = {Barry, Elhadj and Yoshikawa, Harunori and Kang, Changwoo and Meyer, Antoine and Meier, Martin and Crumeyrolle, Olivier and Egbers, Christoph and Mutabazi, Innocent}, title = {Thermoelectric convection in a planar capacitor: theoretical studies and experiments in parabolic flights}, series = {Comptes Rendus M{\´e}canique}, journal = {Comptes Rendus M{\´e}canique}, issn = {1873-7234}, pages = {1 -- 15}, language = {en} } @misc{GaillardSzaboTravnikovetal., author = {Gaillard, Yann and Szabo, Peter and Travnikov, Vadim and Egbers, Christoph}, title = {Thermo-electrohydrodynamic convection in a rotating shell with central force field}, series = {International Journal of Heat and Mass Transfer}, volume = {Vol. 2018}, journal = {International Journal of Heat and Mass Transfer}, issn = {0017-9310}, doi = {10.1016/j.ijheatmasstransfer.2023.124760}, pages = {1 -- 12}, language = {en} } @misc{ZanounDewidarEgbers, author = {Zanoun, El-Sayed and Dewidar, Yasser and Egbers, Christoph}, title = {Reynolds number dependence of azimuthal and streamwise pipe flow structures}, series = {Journal of Fluid Mechanics}, volume = {Vol. 973}, journal = {Journal of Fluid Mechanics}, issn = {0022-1120}, doi = {10.1017/jfm.2023.700}, pages = {1 -- 36}, language = {en} } @misc{SzaboGaillardZaussingeretal., author = {Szabo, Peter and Gaillard, Yann and Zaussinger, Florian and Egbers, Christoph}, title = {Thermo-electrohydrodynamic convection in a differentially heated shell with electric central force field}, series = {Proceedings in applied mathematics and mechanics : PAMM}, volume = {23}, journal = {Proceedings in applied mathematics and mechanics : PAMM}, number = {1}, issn = {1617-7061}, doi = {10.1002/pamm.202200121}, language = {en} } @misc{HamedeMerboldEgbers, author = {Hamede, Mohammed Hussein and Merbold, Sebastian and Egbers, Christoph}, title = {Experimental investigation of turbulent counter-rotating Taylor-Couette flows for radius ratio η = 0.1}, series = {Journal of Fluid Mechanics}, volume = {964}, journal = {Journal of Fluid Mechanics}, issn = {1469-7645}, doi = {10.1017/jfm.2023.392}, pages = {A36-1 -- A36-29}, language = {en} } @misc{LabarbeLeGalHarlanderetal., author = {Labarbe, Joris and Le Gal, Patrice and Harlander, Uwe and Le Diz{\`e}s, St{\´e}phane and Favier, Benjamin}, title = {Localized layers of turbulence in stratified horizontally sheared Poiseuille flow}, series = {Fluid Dynamics}, journal = {Fluid Dynamics}, pages = {20}, language = {en} }