TY - CHAP A1 - Zaussinger, Florian A1 - Haun, Peter A1 - Neben, Matthias A1 - Egbers, Christoph A1 - Mutabazi, Innocent T1 - Dielectrically driven convection in spherical gap geometry T2 - International Conference on Rayleigh Bénard Turbulence, May 14-18, 2018, Enschede, NL Y1 - 2018 UR - https://pof.tnw.utwente.nl/rbc2018/wp-content/uploads/2018/05/RBC2018_abstract_booklet.pdf ER - TY - CHAP A1 - Jongmanns, Marcel A1 - Meyer, Antoine A1 - Meier, Martin A1 - Kang, Changwoo A1 - Mutabazi, Innocent A1 - Egbers, Christoph T1 - Experiments on thermoelectric convection in dielectric liquids in a cylindrical annulus under parabolic flight conditions T2 - Abstract booklet for the International Conference on Rayleigh Bénard Turbulence, May 14-18, 2018, Enschede, NL Y1 - 2018 UR - https://pof.tnw.utwente.nl/rbc2018/wp-content/uploads/2018/05/RBC2018_abstract_booklet.pdf ER - TY - CHAP A1 - Hasanuzzaman, Gazi A1 - Merbold, Sebastian A1 - Motuz, Vasyl A1 - Egbers, Christoph A1 - Cuvier, Christophe A1 - Foucaut, Jean-Marc ED - Kähler, Christian J. ED - Hain, Rainer ED - Scharnowski, Sven ED - Fuchs, Thomas T1 - Experimental investigation of active control in turbulent boundary layer using uniform blowing T2 - Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018 Y1 - 2018 UR - https://doi.org/10.18726/2018_2 SN - 978-3-943207-32-3 SP - 180 EP - 185 PB - Institute of Fluid Mechanics and Aerodynamics, Universität der Bundeswehr CY - Neubiberg ER - TY - CHAP A1 - Zanoun, El-Sayed A1 - Motuz, Vasyl A1 - Egbers, Christoph A1 - Keller, J. A1 - Dörner, K. ED - Kähler, Christian J. ED - Hain, Rainer ED - Scharnowski, Sven ED - Fuchs, Thomas T1 - Stereoscopic-PIV and Hot Wire Measurements in Pipe Flow at Relatively High T2 - Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018 Y1 - 2018 SN - 978-3-943207-32-3 U6 - https://doi.org/10.18726/2018_2 SP - 877 EP - 882 PB - Institute of Fluid Mechanics and Aerodynamics, Universität der Bundeswehr CY - Neubiberg ER - TY - CHAP A1 - Merbold, Sebastian A1 - Froitzheim, Andreas A1 - Egbers, Christoph ED - Kähler, Christian J. ED - Hain, Rainer ED - Scharnowski, Sven ED - Fuchs, Thomas T1 - Torque in turbulent Taylor-Couette flow for small radius ratios T2 - Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018 Y1 - 2018 SN - 978-3-943207-32-3 U6 - https://doi.org/10.18726/2018_2 SP - 598 EP - 602 PB - Institute of Fluid Mechanics and Aerodynamics, Universität der Bundeswehr CY - Neubiberg ER - TY - GEN A1 - Kupka, Friedrich A1 - Zaussinger, Florian A1 - Montgomery, M. H. T1 - Mixing and overshooting in surface convection zones of DA white dwarfs: First results from ANTARES T2 - Monthly Notices of the Royal Astronomical Society Y1 - 2018 SN - 1365-2966 SN - 0035-8711 VL - 474 IS - 4 SP - 4660 EP - 4671 ER - TY - GEN A1 - Zaussinger, Florian T1 - A dynamic beam model for the motility of Listeria monocytogenes T2 - Acta Mechanica Y1 - 2018 U6 - https://doi.org/10.1007/s00707-018-2277-1 SN - 1619-6937 SN - 0001-5970 VL - 229 IS - 12 SP - 4927 EP - 4944 ER - TY - CHAP A1 - Egbers, Christoph A1 - Zaussinger, Florian A1 - Haun, Peter A1 - Canfield, Peter A1 - Travnikov, Vadim A1 - Froitzheim, Andreas T1 - Convection in the spherical gap under micro-gravity conditions: From Earth's mantle to atmospheric flows T2 - Book of Abstracts, 20th International Couette Taylor Workshop, July 11 - 13th, 2018 Marseille France Y1 - 2018 UR - https://ictw20.sciencesconf.org/data/pages/PROGRAM_ICTW20.pdf SP - 30 EP - 31 ER - TY - GEN A1 - Seelig, Torsten A1 - Meyer, Antoine A1 - Gerstner, Philipp A1 - Meier, Martin A1 - Jongmanns, Marcel A1 - Baumann, Martin A1 - Heuveline, Vincent A1 - Egbers, Christoph T1 - Dielectrophoretic force-driven convection in annular geometry under Earth’s gravity T2 - International Journal of Heat and Mass Transfer Y1 - 2019 U6 - https://doi.org/10.1016/j.ijheatmasstransfer.2019.04.068 SN - 0017-9310 VL - 139 SP - 386 EP - 398 ER - TY - GEN A1 - Sesterhenn, Jörn A1 - Shahirpour, Amir T1 - A characteristic dynamic mode decomposition T2 - Theoretical and computational fluid dynamics Y1 - 2019 UR - https://rdcu.be/bCCti U6 - https://doi.org/10.1007/s00162-019-00494-y SN - 1432-2250 VL - 33 IS - 3-4 SP - 281 EP - 305 ER - TY - GEN A1 - Harlander, Uwe A1 - Borcia, Ion-Dan A1 - Krebs, Andreas T1 - Nonnormality increases variance of gravity waves trapped in a tilted box T2 - Geophysical & Astrophysical Fluid Dynamics Y1 - 2019 U6 - https://doi.org/10.1080/03091929.2018.1549660 SN - 1029-041 VL - 113 IS - 5/6 SP - 602 EP - 622 ER - TY - GEN A1 - Ghasemi, Abouzar A1 - Klein, Marten A1 - Will, Andreas A1 - Harlander, Uwe T1 - Mean flow generation by an intermittently unstable boundary layer over a sloping wall T2 - Journal of Fluid Mechanics Y1 - 2018 U6 - https://doi.org/10.1017/jfm.2018.552 SN - 1750-6859 IS - vol. 853 SP - 111 EP - 149 ER - TY - GEN A1 - Larcher, Thomas von A1 - Viazzo, Stephane A1 - Harlander, Uwe A1 - Vincze, Miklos T1 - Instabilities and small-scale waves within the Stewartson layers of a thermally driven rotating annulus T2 - Journal of Fluid Mechanics Y1 - 2018 U6 - https://doi.org/10.1017/jfm.2018.10 SN - 1750-6859 IS - vol. 841 SP - 380 EP - 407 ER - TY - GEN A1 - Borcia, Ion-Dan A1 - Borcia, Rodica A1 - Bestehorn, Michael A1 - Richter, Stefan A1 - Xu, Wenchao A1 - Harlander, Uwe T1 - Horizontal Faraday instability and parametric excitation in a circular channel T2 - GAMM 2019, 90th Annual Meeting of the International Assoociation of Applied Mathematics and Mechanics, February 18-22, 2019, Vienna, Austria Y1 - 2018 UR - https://jahrestagung.gamm-ev.de/images/2019/Photos/GAMM2019_BookofAbstracts.pdf SN - 978-3-903024-84-7 SP - 338 PB - TU Verlag CY - Wien ER - TY - GEN A1 - Zanoun, El-Sayed A1 - Egbers, Christoph A1 - Örli, Ramis A1 - Fiorini, Tommaso A1 - Bellani, Gabriele A1 - Talamelli, Alessandro T1 - Experimental evaluation of the mean momentum and kinetic energy balance equations in turbulent pipe flows at high Reynolds number T2 - Journal of Turbulence Y1 - 2019 U6 - https://doi.org/10.1080/14685248.2019.1628968 SN - 1468-5248 VL - 20 IS - 5 SP - 285 EP - 299 ER - TY - GEN A1 - Froitzheim, Andreas A1 - Ezeta, Rodrigo A1 - Huisman, Sander G. A1 - Merbold, Sebastian A1 - Sun, Chao A1 - Lohse, Detlef A1 - Egbers, Christoph T1 - Statistics, plumes and azimuthally travelling waves in ultimate Taylor–Couette turbulent vortices T2 - Journal of Fluid Mechanics Y1 - 2019 U6 - https://doi.org/10.1017/jfm.2019.552 SN - 1469-7645 SN - 0022-1120 VL - Volume 876 SP - 733 EP - 765 ER - TY - GEN A1 - Froitzheim, Andreas A1 - Merbold, Sebastian A1 - Ostilla-Mónico, Rodolfo A1 - Egbers, Christoph T1 - Angular momentum transport and flow organization in Taylor-Couette flow at radius ratio of η=0.357" T2 - Physical Review Fluids Y1 - 2019 UR - https://link.aps.org/doi/10.1103/PhysRevFluids.4.084605 U6 - https://doi.org/10.1103/PhysRevFluids.4.084605 VL - 4 ER - TY - THES A1 - Merbold, Sebastian T1 - Experimental investigation on turbulent transport in Taylor-Couette flow Y1 - 2019 UR - https://cuvillier.de/de/shop/publications/8089-experimental-investigation-on-turbulent-transport-in-taylor-couette-flow SN - 978-3-7369-7068-7 PB - Cuvillier Verlag CY - Göttingen ET - 1. Auflage ER - TY - THES A1 - Froitzheim, Andreas T1 - Angular momentum transport and pattern formation in medium- and wide-gap turbulent Taylor-Couette flow : an experimental study Y1 - 2019 UR - https://cuvillier.de/de/shop/publications/8095-angular-momentum-transport-and-pattern-formation-in-medium-and-wide-gap-turbulent-taylor-couette-flow SN - 978-3-7369-7073-1 PB - Cuvilier Verlag CY - Göttingen ET - 1. Auflage ER - TY - THES A1 - Neben, Matthias T1 - 3D-CFD der Gas-Partikel-Strömung in einer Laval-Düse zur Vorhersage mechanischer Erosion Y1 - 2019 UR - https://opus4.kobv.de/opus4-btu/frontdoor/index/index/docId/4797 CY - Cottbus ER - TY - GEN A1 - Zaussinger, Florian A1 - Canfield, Peter A1 - Froitzheim, Andreas A1 - Travnikov, Vadim A1 - Haun, Peter A1 - Meier, Martin A1 - Meyer, Antoine A1 - Heintzmann, Pascal A1 - Driebe, Thomas A1 - Egbers, Christoph T1 - AtmoFlow - Investigation of Atmospheric-Like Fluid Flows Under Microgravity Conditions T2 - Microgravity Science and Technology : An International Journal for Microgravity and Space Exploration Related Research Y1 - 2019 UR - https://link.springer.com/article/10.1007/s12217-019-09717-7 UR - 1875-0494 UR - https://www-docs.b-tu.de/fg-aerodynamik-stroemungslehre/public/PDF/Pubs/ELGRA2019_Book-of-abstracts.pdf U6 - https://doi.org/10.1007/s12217-019-09717-7 SN - 0938-0108 SP - 1 EP - 19 PB - Springer ER - TY - GEN A1 - Meyer, Antoine A1 - Meier, Martin A1 - Jongmanns, Marcel A1 - Seelig, Torsten A1 - Egbers, Christoph A1 - Mutabazi, Innocent T1 - Effect of the Initial Conditions on the Growth of Thermoelectric Instabilities During Parabolic T2 - Microgravity Science and Technology Y1 - 2019 UR - https://link.springer.com/article/10.1007/s12217-019-09755-1 U6 - https://doi.org/10.1007/s12217-019-09755-1 SN - 1875-0494 SN - 0938-0108 VL - 31 IS - 5 SP - 715 EP - 721 ER - TY - THES A1 - Jongmanns, Marcel T1 - Flow control of thermal convection using thermo electro hydrodynamic forces in a cylindrical annulus Y1 - 2019 SN - 978-3-7369-7044-1 SN - 3-7369-7044-7 PB - Cuvillier Verlag CY - Göttingen ER - TY - GEN A1 - Meyer, Antoine A1 - Seelig, Torsten A1 - Gerstner, Philipp A1 - Kang, Changwoo A1 - Meier, Martin A1 - Jongmanns, Marcel A1 - Baumann, Martin A1 - Mutabazi, Innocent A1 - Heuveline, Vincent A1 - Egbers, Christoph T1 - Thermo-electro-hydrodynamic instability of a dielectric fluid in a vertical cylindrical annulus: Earth’s gravity and weightless conditions T2 - LIA-ISTROF workshop 2019 Instabilities and Turbulence in Stratified Rotational Flows Cottbus, 19th-20th June 2019 Brandenburg Y1 - 2019 UR - https://www-docs.b-tu.de/fg-aerodynamik-stroemungslehre/public/PDF/Pubs/ELGRA2019_Book-of-abstracts.pdf CY - Cottbus ER - TY - GEN A1 - Meyer, Antoine A1 - Seelig, Torsten A1 - Gerstner, Philipp A1 - Kang, Changwoo A1 - Meier, Martin A1 - Jongmanns, Marcel A1 - Baumann, Martin A1 - Mutabazi, Innocent A1 - Heuveline, Vincent A1 - Egbers, Christoph T1 - Thermoelectric instability in a vertical cylindrical annulus T2 - 8th International Symposium on Bifurcations and Instabilities in Fluid Dynamics (BIFD), 16-19 July, 2019, University of Limerick, Ireland Y1 - 2019 CY - Limerick ER - TY - GEN A1 - Meyer, Antoine A1 - Seelig, Torsten A1 - Meier, Martin A1 - Mutabazi, Innocent A1 - Egbers, Christoph T1 - Thermo-electro-hydrodynamic instability of a dielectric fluid in a vertical cylindrical annulus: Earth's gravity and weightless conditions T2 - 26th European Low Gravity Research Association Biennial Symposium and General Assembly, Granada (Spanien), September 24-27, 2019 Y1 - 2019 UR - https://www-docs.b-tu.de/fg-aerodynamik-stroemungslehre/public/PDF/Pubs/ELGRA2019_Book-of-abstracts.pdf SP - 115 EP - 116 ER - TY - GEN A1 - Meier, Martin A1 - Meyer, Antoine A1 - Mutabazi, Innocent A1 - Egbers, Christoph T1 - Microgravity experiments on thermo-electric flows T2 - 26th European Low Gravity Research Association Biennial Symposium and General Assembly, Granada (Spanien), September 24-27, 2019 Y1 - 2019 UR - https://www-docs.b-tu.de/fg-aerodynamik-stroemungslehre/public/PDF/Pubs/ELGRA2019_Book-of-abstracts.pdf SP - 293 EP - 294 ER - TY - GEN A1 - Rodda, Costanza A1 - Hien, Steffen A1 - Achatz, Ulrich A1 - Borcia, Ion-Dan A1 - Le Gal, Patrice A1 - Vincze, Miklos A1 - Harlander, Uwe T1 - Differentially heated rotating annulus experiments to study gravity wave emission from jets and fronts T2 - 17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy Y1 - 2019 UR - http://www.symposium.it/files/eventi/84/etc-2019-561.pdf CY - Turin ER - TY - GEN A1 - Harlander, Uwe A1 - Le Gal, Patrice A1 - Borcia, Ion-Dan A1 - Le Dizès, Stéphane A1 - Chen, Jun A1 - Favier, Benjamin T1 - The linear instability of the stratified plane Poiseuille flow T2 - 17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy Y1 - 2019 UR - http://www.symposium.it/files/eventi/84/etc-2019-561.pdf CY - Turin ER - TY - GEN A1 - Zaussinger, Florian A1 - Egbers, Christoph A1 - Travnikov, Vadim A1 - Haun, Peter T1 - Influence of internal heating on convection in the rotating spherical gap T2 - 17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy Y1 - 2019 UR - http://www.symposium.it/files/eventi/84/etc-2019-561.pdf CY - Turin ER - TY - GEN A1 - Xu, Wenchao A1 - Harlander, Uwe T1 - Mean flow generation in rotating annulus with stochastic methods T2 - 17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy Y1 - 2019 UR - http://www.symposium.it/files/eventi/84/etc-2019-561.pdf CY - Turin ER - TY - CHAP A1 - Yousry, Mohamed A1 - Merbold, Sebastian A1 - Egbers, Christoph ED - Delgado, Antonio T1 - Influence of convex structured surfaces on turbulent channel flow at different channel heights T2 - Experimentelle Strömungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen Y1 - 2019 SN - 978-3-9816764-6-4 SP - 5.1 EP - 5.9 PB - Deutsche Gesellschaft für Laser-Anemometrie - German Association for Laser Anemometry GALA e.V. CY - Karlsruhe ER - TY - GEN A1 - Borcia, Ion-Dan A1 - Borcia, Rodica A1 - Xu, Wenchao A1 - Bestehorn, Michael A1 - Richter, Sebastian A1 - Harlander, Uwe T1 - Undular bores in a large circular channel T2 - European Journal of Mechanics - B/Fluids N2 - 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. KW - Undular bores KW - Bore collision KW - Periodical boundary conditions Y1 - 2020 UR - https://www.sciencedirect.com/science/article/pii/S0997754619300706?via%3Dihub U6 - https://doi.org/10.1016/j.euromechflu.2019.09.003 SN - 0997-7546 VL - 79 SP - 67 EP - 73 ER - TY - GEN A1 - Travnikov, Vadim A1 - Egbers, Christoph T1 - Linear stability analysis of the convective flow in a spherical gap with rotating inner surface T2 - International Journal of Heat and Mass Transfer Y1 - 2020 UR - https://www.sciencedirect.com/science/article/pii/S0017931019315716?via%3Dihub U6 - https://doi.org/10.1016/j.ijheatmasstransfer.2019.119052 SN - 0017-9310 SN - 1879-2189 VL - 148 ER - TY - GEN A1 - Kurgansky, Michael V. A1 - Seelig, Torsten A1 - Klein, Marten A1 - Will, Andreas A1 - Harlander, Uwe T1 - Mean flow generation due to longitudinal librations of sidewalls of a rotating annulus T2 - Geophysical & Astrophysical Fluid Dynamics N2 - 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. KW - boundary layer structure KW - geophysical and geological flows KW - longitudinal libration Y1 - 2020 U6 - https://doi.org/10.1080/03091929.2019.1692829 SN - 1029-0419 VL - 114 IS - 6 SP - 762 ER - TY - GEN A1 - Nowak, Torsten A1 - Merbold, Sebastian A1 - Egbers, Christoph A1 - Schacht, Ralph ED - Delgado, Antonio T1 - Experimentelle Studie mit numerischer Validierung von thermi-schen Kopplungs-Phänomenen mit in Flip-Chip-Technologie aufge-bauten Testchips auf Leiterplatten T2 - Experimentelle Strömungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen N2 - In aktuellen mikro-elektronischen Systemen müssen 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 Kühlstrategie und der Definition von konduktiven und konvektiven Entwärmungspfade, die bereits während der Layout-Designphase der Baugruppe berücksichtigt werden sollten. Strömungsmechanische Simulationen (CFD) können dabei ein erstes Abbild zur Analyse von Kopplungseffekten zwischen den Wärmequellen und der Umgebung liefern. Diese sind jedoch oft zeitaufwendig und es bedarf zumindest ein gewisses Grundverständnis, um die Fluid-mechanischen Parameter, das Vernetzen der Geometrien und die gewonnenen Ergebnisse korrekt zu interpretieren. Erste analytische Ansätze zur reduzierten Beschreibung von ungehäusten Chips auf Leiterplattensubstrat können durch thermische Widerstandsnetzwerke abgebildet und durch Aufteilung der Wärmeströme in Richtung Substrat (Wärmeleitung) und in Richtung des bewegten Fluides (Konvektion) näher beschrieben werden. KW - Wärmekopplung KW - Mikroelektronik KW - in-situ Temperaturerfassung Y1 - 2019 SN - 978-3-9816764-6-4 SP - 27.1 EP - 27.8 PB - Deutsche Gesellschaft für Laser-Anemometrie - German Association for Laser Anemometry GALA e.V. CY - Karlsruhe ER - TY - GEN A1 - Hasanuzzaman, Gazi A1 - Merbold, Sebastian A1 - Cuvier, Christophe A1 - Motuz, Vasyl A1 - Foucaut, Jean-Marc A1 - Egbers, Christoph T1 - Experimental investigation of turbulent boundary layers at high Reynolds number with uniform blowing, part I: statistics T2 - Journal of Turbulence N2 - 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. KW - Turbulent boundary layers KW - drag reduction KW - flow control KW - particle image velocimetry KW - uniform blowing Y1 - 2020 UR - https://www.tandfonline.com/doi/full/10.1080/14685248.2020.1740239 U6 - https://doi.org/10.1080/14685248.2020.1740239 SN - 1468-5248 N1 - European High-Performance Infrastructures in Turbulence (EuHIT, FP7-INFRASTRUCTURES-2012-1) IS - 3 SP - 129 EP - 165 ER - TY - GEN A1 - Xu, Wenchao A1 - Harlander, Uwe T1 - Inertial mode interactions in a rotating tilted cylindrical annulus with free surface T2 - Physical Review Fluids Y1 - 2020 UR - https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.5.094801 U6 - https://doi.org/10.1103/PhysRevFluids.5.094801 SN - 2469-990X VL - 5 IS - 9 ER - TY - GEN A1 - Szabo, Peter A1 - Zaussinger, Florian A1 - Haun, Peter A1 - Travnikov, Vadim A1 - Meier, Martin A1 - Egbers, Christoph T1 - Complementary numerical and experimental study in the baroclinic annulus for the microgravity experiment AtmoFlow T2 - EGU General Assembly 2020, EGU2020-20956, Online | 4–8 May 2020 Y1 - 2020 U6 - https://doi.org/10.5194/egusphere-egu2020-20956 ER - TY - GEN A1 - Travnikov, Vadim A1 - Zaussinger, Florian A1 - Haun, Peter A1 - Egbers, Christoph T1 - Influence of dielectrical heating on convective flow in a radial force field T2 - Physical Review E Y1 - 2020 U6 - https://doi.org/10.1103/PhysRevE.101.053106 SN - 2470-0053 SN - 2470-0045 VL - 101 IS - 5 ER - TY - GEN A1 - Zaussinger, Florian A1 - Haun, Peter A1 - Szabo, Peter A1 - Travnikov, Vadim A1 - Al-Kawwas, Mustafa A1 - Egbers, Christoph T1 - Rotating spherical gap convection in the GeoFlow International Space Station (ISS) experiment T2 - Physical Review Fluids Y1 - 2020 U6 - https://doi.org/10.1103/PhysRevFluids.5.063502 SN - 2469-990X VL - 5 IS - 6 ER - TY - GEN A1 - Rodda, Costanza A1 - Harlander, Uwe T1 - Transition from Geostrophic Flows to Inertia–Gravity Waves in the Spectrum of a Differentially Heated Rotating Annulus Experiment T2 - Journal of the Atmospheric Sciences Y1 - 2020 U6 - https://doi.org/10.1175/JAS-D-20-0033.1 SN - 1520-0469 SN - 0022-4928 VL - 77 IS - 8 SP - 2793 EP - 2806 ER - TY - GEN A1 - Harlander, Uwe T1 - Comparison of paradigmatic gravity wave models for ocean and atmosphere T2 - EGU General Assembly 2020, Online | 4–8 May 2020 Y1 - 2020 U6 - https://doi.org/10.5194/egusphere-egu2020-7222 ER - TY - GEN A1 - Vincze, Miklos A1 - Bozóki, Tamás A1 - Herein, Mátyás A1 - Borcia, Ion-Dan A1 - Rodda, Costanza A1 - Pálfy, József A1 - Nyerges, Anita A1 - Harlander, Uwe T1 - Climate impact of the Drake Passage opening: lessons from a minimalistic laboratory experiment T2 - EGU General Assembly 2020, Online | 4–8 May 2020 Y1 - 2020 U6 - https://doi.org/10.5194/egusphere-egu2020-5004 ER - TY - GEN A1 - Früh, Wolf-Gerrit A1 - Szabo, Peter A1 - Egbers, Christoph A1 - Harlander, Uwe T1 - Locating sources of variability in the transition to Structural Vacillation in the baroclinic annulus T2 - EGU General Assembly 2020, Online | 4–8 May 2020 Y1 - 2020 UR - https://ui.adsabs.harvard.edu/abs/2020EGUGA..22.7262F/abstract U6 - https://doi.org/10.5194/egusphere-egu2020-7262 ER - TY - GEN A1 - Yoshikawa, Harunori A1 - Kang, Changwoo A1 - Mutabazi, Innocent A1 - Zaussinger, Florian A1 - Haun, Peter A1 - Egbers, Christoph T1 - Thermoelectrohydrodynamic convection in parallel plate capacitors under dielectric heating conditions T2 - Physical review fluids Y1 - 2020 U6 - https://doi.org/10.1103/PhysRevFluids.5.113503 SN - 2469-990X VL - 5 IS - 11 ER - TY - GEN A1 - Zanoun, El-Sayed A1 - Egbers, Christoph A1 - Dewidar, Yasser T1 - Two-Point Velocity Correlations in Fully Developed Turbulent Pipe Flow at Shear Reynolds Number of Reτ ≈ 4000 T2 - Proceedings in Applied Mathematics and Mechanics : (PAMM) Y1 - 2021 U6 - https://doi.org/10.1002/pamm.202000330 SN - 1617-7061 VL - 20 IS - 1 ER - TY - GEN A1 - Hallol, Zeinab A1 - Merbold, Sebastian A1 - Egbers, Christoph T1 - Contribution of Large and Very Large Scale Motions to the Turbulent Kinetic energy in Turbulent Pipe Flow T2 - Proceedings in applied mathematics and mechanics : PAMM Y1 - 2021 U6 - https://doi.org/10.1002/pamm.202000229 SN - 1617-7061 VL - 20 IS - 1 ER - TY - GEN A1 - Richter, Stefan A1 - Zanoun, El-Sayed A1 - Egbers, Christoph T1 - Investigation of Large Scale Motion Interaction with the Near‐Wall Turbulence T2 - Proceedings in applied mathematics and mechanics : PAMM Y1 - 2021 U6 - https://doi.org/10.1002/pamm.202000331 SN - 1617-7061 VL - 20 IS - 1 ER - TY - GEN A1 - Zanoun, El-Sayed A1 - Egbers, Christoph A1 - Nagib, H. M. A1 - Durst, F. A1 - Bellani, Gabriele A1 - Talamelli, Alessandro T1 - Wall friction relations in wall-bounded shear flows T2 - European Journal of Mechanics - B/Fluids Y1 - 2021 U6 - https://doi.org/10.1016/j.euromechflu.2021.03.007 SN - 1873-7390 SN - 0997-7546 VL - Vol. 89 SP - 171 EP - 179 ER - TY - GEN A1 - Rodda, Costanza A1 - Harlander, Uwe A1 - Savaro, C. A1 - Campagne, A. A1 - Calpe Linares, M. A1 - Augier, P. A1 - Sommeria, Joel A1 - Valran, T. A1 - Viboud, Samuel A1 - Mordant, N. T1 - Can Laboratory experiments help to explain the atmosphere and ocean's energetics? T2 - Colaborative Research Center TRR 181, Energy transfers in Atmosphere and Oceans, 16th - 18th Mar. 2021, Universität Hamburg, Center for Earth System Research and Sustainability (CEN) Y1 - 2021 UR - https://www.b-tu.de/fg-aerodynamik-stroemungslehre/publikationen/tagungsbaende ER - TY - GEN A1 - Szabo, Peter A1 - Meier, Martin A1 - Meyer, Antoine A1 - Barry, Elhadj A1 - Motuz, Vasyl A1 - Mutabazi, Innocent A1 - Egbers, Christoph T1 - PIV and shadowgraph measurements of thermo-electrohydrodynamic convection in a horizontal aligned differentially heated annulus at different gravity conditions T2 - Experimental Thermal and Fluid Science Y1 - 2021 UR - https://www.sciencedirect.com/science/article/pii/S0894177721001175?via%3Dihub U6 - https://doi.org/10.1016/j.expthermflusci.2021.110470 SN - 1879-2286 VL - 129 ER - TY - THES A1 - Maltese Meletti de Oliveira, Gabriel T1 - High-performance computing and laboratory experiments on strato-rotational instabilities Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus4-54408 CY - Cottbus ER - TY - THES A1 - Xu, Wenchao T1 - Experiments on nonlinear waves in homogeneous flows with free upper surface and time-dependent forcing T2 - Experimente zu nichtlinearen Wellen in homogenen Strömungen mit freier Oberfläche und zeitabhängigem Antrieb Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus4-53860 CY - Cottbus ER - TY - THES A1 - Hallol, Zeinab T1 - Behaviour of energetic coherent structures in turbulent pipe flow at high Reynolds numbers Y1 - 2021 SN - 978-3-7369-7501-9 PB - Cuvillier Verlag CY - Göttingen ER - TY - GEN A1 - Vincze, Miklos A1 - Bozóki, Tamás A1 - Herein, Mátyás A1 - Borcia, Ion-Dan A1 - Harlander, Uwe A1 - Horicsányi, Attila A1 - Nyerges, Anita A1 - Rodda, Costanza A1 - Pál, András A1 - Pálfy, József T1 - The Drake Passage opening from an experimental fluid dynamics point of view T2 - SScientific Reports Y1 - 2021 U6 - https://doi.org/10.1038/s41598-021-99123-0 SN - 2045-2322 VL - 11 ER - TY - GEN A1 - Maltese Meletti de Oliveira, Gabriel A1 - Abide, Stéphane A1 - Viazzo, Stephane A1 - Krebs, Andreas A1 - Harlander, Uwe T1 - Experiments and long-term high-performance computations on amplitude modulations of strato-rotational flows T2 - Geophysical & Astrophysical Fluid Dynamics Y1 - 2021 U6 - https://doi.org/10.1080/03091929.2020.1795647 SN - 1029-0419 SN - 0309-1929 VL - 115 IS - 3 SP - 297 EP - 321 ER - TY - GEN A1 - Harlander, Uwe A1 - Kurgansky, Michael V. T1 - Two-dimensional internal gravity wave beam instability. Linear theory and subcritical instability T2 - Geophysical & Astrophysical Fluid Dynamics Y1 - 2021 U6 - https://doi.org/10.1080/03091929.2021.1943379 SN - 1029-0419 SN - 0309-1929 ER - TY - GEN A1 - Johnston, Ellis A1 - Szabo, Peter A1 - Bennett, Nick T1 - Cooling silicon photovoltaic cells using finned heat sinks and the effect of inclination angle T2 - Thermal Science and Engineering Progress Y1 - 2021 U6 - https://doi.org/10.1016/j.tsep.2021.100902 SN - 2451-9049 VL - Vol. 23 ER - TY - CHAP A1 - Erdogdu, Ahmed Oguzhan A1 - Szabo, Peter A1 - Carter, R. A1 - Gevre, M.-E. A1 - Haun, Peter A1 - Zaussinger, Florian A1 - Schulze, B. A1 - Meier, Martin A1 - Egbers, Christoph T1 - Verwendung der Wollaston-Scherinterferometrie zur Untersuchung des Brechungsindexgradienten in einem differentiell beheizten Ringspalt T2 - Experimentelle Strömungsmechanik : 28. Fachtagung, 7.-9. September 2021, Bremen T2 - Utilizing Wollaston shearing interferometry to investigate the refractive index gradient in a differentially heated annulus Y1 - 2021 SN - 978-3-9816764-7-1 SP - 19 PB - Deutsche Gesellschaft für Laser-Anemometrie - German Association for Laser Anemometry GALA e.V. CY - Karlsruhe ER - TY - CHAP A1 - Meier, Martin A1 - Szabo, Peter A1 - Motuz, Vasyl A1 - Egbers, Christoph T1 - Strömungsfeldvisualisierung von thermo-elektrodynamischer Konvektion mit einer kombinierten PIV- und Schattentechnik T2 - Experimentelle Strömungsmechanik : 28. Fachtagung, 7.-9. September 2021, Bremen T2 - Flow field visualisation of thermo-electrodynamic convection utilising a combined PIV and Shadowgraph technique Y1 - 2021 SN - 978-3-9816764-7-1 SP - 6 PB - Deutsche Gesellschaft für Laser-Anemometrie - German Association for Laser Anemometry GALA e.V. CY - Karlsruhe ER - TY - THES A1 - Hasanuzzaman, Gazi T1 - Experimental investigation of turbulent boundary layer with uniform blowing at moderate and high Reynolds numbers N2 - 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. KW - Turbulent boundary layers KW - Drag reduction KW - Flow control KW - Particle Image Velocimetry Y1 - 2021 U6 - https://doi.org/10.26127/BTUOpen-5566 PB - BTU CY - Cottbus-Senftenberg ER - TY - GEN A1 - Le Gal, Patrice A1 - Harlander, Uwe A1 - Borcia, Ion-Dan A1 - Le Dizès, Stéphane A1 - Chen, J. A1 - Favier, Benjamin T1 - Instability of vertically stratified horizontal plane Poiseuille flow T2 - Journal of Fluid Mechanics Y1 - 2021 U6 - https://doi.org/10.1017/jfm.2020.917 SN - 1469-7645 SN - 0022-1120 VL - 907 IS - R1 SP - 1 EP - 14 ER - TY - GEN A1 - Hallol, Zeinab A1 - Yousry, Mohamed A1 - Merbold, Sebastian A1 - Egbers, Christoph T1 - Time-resolved PIV measurements in fully developed turbulent pipe flow T2 - 25th International Congress of Theoretical and Applied Mechanics Milan (Italy), 22-27 August 2021 Y1 - 2021 UR - https://iutam.org/publications/ictam-proceedings/ictam_2020/ SN - 978-83-65550-31-6 SP - 1374 EP - 1375 ER - TY - GEN A1 - Szabo, Peter A1 - Meyer, Antoine A1 - Meier, Martin A1 - Motuz, Vasyl A1 - Sliavin, Yaraslau A1 - Egbers, Christoph T1 - Simultaneous PIV and shadowgraph measurements of thermo-electrohydrodynamic convection in a differentially heated annulus T2 - Technisches Messen Y1 - 2022 U6 - https://doi.org/10.1515/teme-2021-0120 SN - 2196-7113 VL - 89 IS - 3 SP - 148 EP - 157 ER - TY - GEN A1 - Hallol, Zeinab A1 - Yousry, Mohamed A1 - Merbold, Sebastian A1 - Egbers, Christoph T1 - Effect of High Reynolds Number on the Behaviour of Large and Very Large Scale Motions in Fully Developed Turbulent Pipe Flow T2 - Fluid Dynamics Y1 - 2022 UR - https://link.springer.com/article/10.1134/S0015462822040048 U6 - https://doi.org/10.1134/S0015462822040048 SN - 0015-4628 SN - 1573-8507 VL - 57 IS - 4 SP - 524 EP - 537 ER - TY - GEN A1 - Hasanuzzaman, Gazi A1 - Merbold, Sebastian A1 - Motuz, Vasyl A1 - Egbers, Christoph T1 - Enhanced outer peaks in turbulent boundary layer using uniform blowing at moderate Reynolds number T2 - Journal of Turbulence Y1 - 2022 U6 - https://doi.org/10.1080/14685248.2021.2014058 SN - 1468-5248 VL - 23 IS - 1-2 SP - 68 EP - 95 ER - TY - GEN A1 - Hallol, Zeinab A1 - Yousry, Mohamed A1 - Merbold, Sebastian A1 - Egbers, Christoph T1 - Experimental investigation to study energetic structures in pipe flow at high Reynolds numbers using POD analysis T2 - Journal of the Physical Society of Japan Y1 - 2022 U6 - https://doi.org/10.7566/JPSJ.91.094401 SN - 0031-9015 VL - 91 IS - 9 SP - 1 EP - 10 ER - TY - GEN A1 - Harlander, Uwe A1 - Borcia, Ion-Dan A1 - Vincze, Miklos A1 - Rodda, Costanza T1 - Probability Distribution of Extreme Events in a Baroclinic Wave Laboratory Experiment T2 - Fluids N2 - 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. Y1 - 2022 U6 - https://doi.org/10.3390/fluids7080274 SN - 2311-5521 VL - 7 IS - 8 ER - TY - GEN A1 - Rodda, Costanza A1 - Harlander, Uwe A1 - Vincze, Miklos T1 - Jet stream variability in a polar warming scenario – a laboratory perspective T2 - Weather and Climate Dynamics Y1 - 2022 UR - https://wcd.copernicus.org/articles/3/937/2022/ U6 - https://doi.org/10.5194/wcd-3-937-2022 SN - 2698-4016 VL - 3 IS - 3 SP - 937 EP - 950 ER - TY - CHAP A1 - Sliavin, Yaraslau A1 - Szabo, Peter A1 - Früh, Wolf-Gerrit A1 - Schulze, Björn A1 - Egbers, Christoph T1 - Utilizing infrared thermography to investigate baroclinic instability in the differentially heated rotating annulus T2 - GALA-Fachtagung "Experimentelle Strömungsmechanik", 6.- 8. September 2022, Ilmenau Y1 - 2022 UR - https://www.researchgate.net/publication/363896369_GALA_Conference_2022_06_-_0809_Utilizing_infrared_thermography_to_investigate_baroclinic_instability_in_the_differentially_heated_rotating_annulus U6 - https://doi.org/10.13140/RG.2.2.32413.59360 SP - 49.1 EP - 49.8 ER - TY - CHAP A1 - Strangfeld, Matthias A1 - Bölük, Oguzhan A1 - Szabo, Peter A1 - Meier, Martin A1 - Meyer, Antoine A1 - Sliavin, Yaraslau A1 - Motuz, Vasyl A1 - Egbers, Christoph T1 - Thermo-electrohydrodynamic convection in a dielectric fluid layer with volumetric heating T2 - GALA-Fachtagung "Experimentelle Strömungsmechanik", 6.- 8. September 2022, Ilmenau Y1 - 2022 UR - https://www.researchgate.net/publication/363615870_Thermo-electrohydrodynamic_convection_in_a_dielectric_fluid_layer_with_volumetric_heating SP - 43.1 EP - 43.8 ER - TY - GEN A1 - Szabo, Peter A1 - Gaillard, Yann A1 - Haun, P. A1 - Carter, R. A1 - Adrian, A. A1 - Sliavin, Yaraslau A1 - Zaussinger, Florian A1 - Egbers, Christoph T1 - AtmoFlow - Investigating large scale convection in planetary atmospheres T2 - 27th European Low Gravity Research Association Biennial Symposium and General Y1 - 2022 UR - https://www.elgra2022.es/bookofabstractselgra2022 SP - 92 EP - 93 ER - TY - GEN A1 - Meier, M. A1 - Meyer, Antoine A1 - Motuz, Vasyl A1 - Sliavin, Yaraslau A1 - Bista, T. R. A1 - Strangfeld, Matthias A1 - Szabo, Peter A1 - Egbers, Christoph T1 - Dielectrophoretic induced convection in a sounding rocket flight T2 - Tagung: 27th European Low Gravity Research Association Biennial Symposium and General Y1 - 2022 UR - https://www.elgra2022.es/pages/congresos/elgra2022/bookofabstractselgra2022 SP - 37 ER - TY - GEN A1 - Meyer, Antoine A1 - Meier, Martin A1 - Szabo, Peter A1 - Sliavin, Yaraslau A1 - Egbers, Christoph A1 - Gerstner, Philipp A1 - Motuz, Vasyl A1 - Roller, Jonas A1 - Heuveline, Vincent T1 - Stability of a dielectric liquid confined in a differentially heated vertical Taylor-Couette system with applied radial electric field T2 - International Symposium on Bifurcations and Instabilities in Fluid Dynamics Y1 - 2022 UR - https://www.bifd2022.org/scientific-programme SP - 23 ER - TY - GEN A1 - Szabo, Peter A1 - Gaillard, Yann A1 - Egbers, Christoph T1 - Thermo-electrohydrodynamic (TEHD) convection in rotating spherical gap: A 2D-numerical simulation of the AtmoFlow sphere T2 - European Fluid Mechanics Conference EFMC14 Y1 - 2022 UR - https://www.erasmus.gr/microsites/1240/scientific-programme SP - 37 ER - TY - GEN A1 - Szabo, Peter A1 - Früh, Wolf-Gerrit T1 - Effect of intrinsic thermomagnetic convective timescales on the response to periodic modulation of external forcing parameters T2 - European Fluid Mechanics Conference EFMC14 Y1 - 2022 UR - https://www.erasmus.gr/microsites/1240/scientific-programme SP - 35 ER - TY - GEN A1 - Meyer, Antoine A1 - Meier, M. A1 - Szabo, Peter A1 - Sliavin, Yaraslau A1 - Motuz, Vasyl A1 - Gerstner, Philipp A1 - Roller, Jonas A1 - Heuveline, Vincent A1 - Egbers, Christoph T1 - Thermoelectric instability of a dielectric fluid in a cylindrical annulus with vertical or horizontal orientation T2 - European Fluid Mechanics Conference EFMC14 Y1 - 2022 UR - https://www.erasmus.gr/microsites/1240/scientific-programme SP - 37 ER - TY - GEN A1 - Hasanuzzaman, Gazi A1 - Eivazi, Hamidreza A1 - Merbold, Sebastian A1 - Egbers, Christoph A1 - Vinuesa, Ricardo T1 - Enhancement of PIV measurements via physics-informed neural networks T2 - Measurement Science and Technology Y1 - 2022 UR - https://iopscience.iop.org/article/10.1088/1361-6501/aca9eb U6 - https://doi.org/10.1088/1361-6501/aca9eb SN - 1361-6501 ER - TY - GEN A1 - Meyer, Antoine A1 - Yoshikawa, Harunori A1 - Szabo, Peter A1 - Meier, Martin A1 - Egbers, Christoph A1 - Mutabazi, Innocent T1 - Thermoelectric instabilities in a circular Couette flow T2 - Philosophical transactions of the Royal Society. Series A, Mathematical, physical and engineering sciences Y1 - 2023 U6 - https://doi.org/10.1098/rsta.2022.0139 SN - 1471-2962 SN - 1364-503X VL - 381 IS - 2243 ER - TY - GEN A1 - Meyer, Antoine A1 - Meier, Martin A1 - Motuz, Vasyl A1 - Egbers, Christoph T1 - Thermo-electric convection in a cylindrical annulus during a sounding rocket flight T2 - Journal of Fluid Mechanics Y1 - 2023 U6 - https://doi.org/10.1017/jfm.2023.677 SN - 0022-1120 VL - 972 IS - A26 ER - TY - GEN A1 - Panahandeh, Sara A1 - May, Daniel A1 - Grosse-Kockert, Corina A1 - Schacht, Ralph A1 - Abo Ras, Mohamad A1 - Wunderle, Bernhard T1 - Pulsed infrared thermal imaging as inline quality assessment tool T2 - Microelectronics Reliability N2 - 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. KW - Pulsed infrared thermography; Non-destructive technique; Sintered and soldered electronic components; Production line; Failure analysis Y1 - 2023 U6 - https://doi.org/10.1016/j.microrel.2023.114910 SN - 0026-2714 VL - 2023 IS - Volume 142 SP - 1 EP - 11 ER - TY - GEN A1 - Bouras, Dikra A1 - Fellah, Mamoun A1 - Barille, Regis A1 - Obrosov, Aleksei A1 - El-Hiti, Gamal A. T1 - Production of novel Zr–Mg nanoceramics based on kaolinite clay with strong antibacterial activity T2 - Ceramics International N2 - 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. KW - DD3 + 38 wt% ZrO2/Mg KW - Nanoparticles KW - Synthesis KW - Antibacterial activity KW - Transmission electron microscope KW - Nanomaterial Y1 - 2024 U6 - https://doi.org/https://doi.org/10.1016/j.ceramint.2024.05.091 SN - 1873-3956 VL - 50 IS - 16 SP - 27949 EP - 27960 PB - Elsevier ER - TY - GEN A1 - Gaillard, Yann A1 - Szabo, Peter A1 - Travnikov, Vadim A1 - Egbers, Christoph T1 - Modelling Thermo-Electrohydrodynamic Convection in Rotating Spherical Shell Using OpenFOAM ® T2 - OpenFOAM® Journal Y1 - 2025 U6 - https://doi.org/10.51560/ofj.v5.136 VL - 5 (2025) SP - 1 EP - 16 ER - TY - GEN A1 - Hamede, Mohammed Hussein A1 - Roller, Jonas A1 - Meyer, Antoine A1 - Heauveline, Vincent A1 - Egbers, Christoph T1 - Dielectrophoretic force-enhanced thermal convection within a horizontal cylindrical annulus T2 - Physics of Fluids Y1 - 2024 U6 - https://doi.org/10.1063/5.0234772 VL - 36 IS - 12 SP - 1 EP - 14 PB - AIP Publishing ER - TY - GEN A1 - Hasanuzzaman, Gazi A1 - Egbers, Christoph T1 - Flow control of a turbulent boundary layer using uniform blowing T2 - Progress in Turbulence X : Proceedings of the iTi Conference on Turbulence 2023 Y1 - 2024 SN - 978-3-031-55924-2 SN - 978-3-031-55923-5 U6 - https://doi.org/10.1007/978-3-031-55924-2_36 ER - TY - GEN A1 - Borcia, Ion-Dan A1 - Richter, Sebastian A1 - Borcia, Rodica A1 - Schön, Franz-Theo A1 - Harlander, Uwe A1 - Bestehorn, Michael T1 - Wave propagation in a circular channel: sloshing and resonance T2 - The European Physical Journal Special Topics N2 - 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 Y1 - 2023 UR - https://link.springer.com/article/10.1140/epjs/s11734-023-00790-z U6 - https://doi.org/10.1140/epjs/s11734-023-00790-z SN - 1951-6401 SN - 1951-6355 VL - Vol. 232 IS - 4 SP - 461 EP - 468 ER - TY - GEN A1 - Schön, Franz-Theo A1 - Bestehorn, Michael T1 - Instabilities and pattern formation in viscoelastic fluids T2 - The European Physical Journal Special Topics Y1 - 2023 UR - https://link.springer.com/article/10.1140/epjs/s11734-023-00792-x U6 - https://doi.org/10.1140/epjs/s11734-023-00792-x SN - 1951-6401 VL - Vol. 232 IS - 4 SP - 375 EP - 383 ER - TY - CHAP A1 - Merbold, Sebastian A1 - Hasanuzzaman, Gazi A1 - Buchwald, Tom A1 - Schunk, Christoph A1 - Schmeling, Daniel A1 - Volkmann, André A1 - Brinkema, Robert A1 - Hampel, Uwe A1 - Schröder, Andreas A1 - Egbers, Christoph ED - Cierpka, Christian T1 - Reference experiment for aerosol particle transport for dynamic situations T2 - Experimentelle Strömungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau T2 - Referenzexperiment zum Aerosolpartikel-Transport für dynamische Situationen Y1 - 2022 UR - https://www.gala-ev.org/images/Beitraege/Beitraege2022/pdf/09.pdf SN - 978-3-9816764-8-8 PB - Deutsche Gesellschaft für Laser-Anemometrie - German Association for Laser Anemometry GALA e.V. CY - Karlsruhe ER - TY - CHAP A1 - Hamede, Mohammed Hussein A1 - Merbold, Sebastian A1 - Egbers, Christoph T1 - Formation of flow patterns in a counter-rotating very wide gap Taylor-Couette flow (η = 0.1) T2 - Experimentelle Strömungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau T2 - Bildung von Strömungsstrukturen in einem gegenrotierenden Taylor-Couette System mit sehr weitem Spalt (η = 0.1) Y1 - 2022 UR - https://www.gala-ev.org/images/Beitraege/Beitraege2022/pdf/48.pdf SN - 978-3-9816764-8-8 PB - Deutsche Gesellschaft für Laser-Anemometrie - German Association for Laser Anemometry GALA e.V. CY - Karlsruhe ER - TY - CHAP A1 - Merbold, Sebastian A1 - Kumar, Chandana B.V. A1 - Egbers, Christoph T1 - Transparent water tunnel for educational purpose of fundamental flow phenomena and Laser-optical measurement techniques T2 - Experimentelle Strömungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau T2 - Transparenter Wasserkanal zum Lehrzweck grundlegendener Strömungsphänome und Laser-optischen Messtechniken Y1 - 2022 UR - https://www.gala-ev.org/images/Beitraege/Beitraege2022/pdf/53.pdf SN - 978-3-9816764-8-8 PB - Deutsche Gesellschaft für Laser-Anemometrie - German Association for Laser Anemometry GALA e.V. CY - Karlsruhe ER - TY - THES A1 - Rodda, Costanza T1 - Gravity wave emission from jet systems in the differentially heated rotating annulus experiment Y1 - 2019 SN - 978-3-7369-7110-3 PB - Cuvillier Verlag CY - Göttingen ET - 1. Auflage ER - TY - GEN A1 - Hamede, Mohammed Hussein A1 - Merbold, Sebastian A1 - Egbers, Christoph T1 - Transition to the ultimate turbulent regime in a very wide gap Taylor-Couette flow (η = 0.1) with a stationary outer cylinder T2 - EPL (Europhysics Letters) Y1 - 2023 U6 - https://doi.org/10.1209/0295-5075/acdea1 SN - 1286-4854 VL - 143 IS - 2 ER - TY - GEN A1 - Richter, Stefan A1 - Zanoun, El-Sayed A1 - Peixinho, Jorge A1 - Egbers, Christoph T1 - Pipe Flow Development and Transition in CoSmaPipe Facility T2 - Proceedings in applied mathematics and mechanics : PAMM Y1 - 2023 U6 - https://doi.org/10.1002/pamm.202300001 SN - 1617-7061 N1 - 92nd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM) May 2023 VL - 23 IS - 1 ER - TY - GEN A1 - Barry, Elhadj A1 - Yoshikawa, Harunori A1 - Kang, Changwoo A1 - Meyer, Antoine A1 - Meier, Martin A1 - Crumeyrolle, Olivier A1 - Egbers, Christoph A1 - Mutabazi, Innocent T1 - Thermoelectric convection in a planar capacitor: theoretical studies and experiments in parabolic flights T2 - Comptes Rendus Mécanique Y1 - 2023 UR - https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.143/ SN - 1873-7234 SP - 1 EP - 15 ER - TY - GEN A1 - Gaillard, Yann A1 - Szabo, Peter A1 - Travnikov, Vadim A1 - Egbers, Christoph T1 - Thermo-electrohydrodynamic convection in a rotating shell with central force field T2 - International Journal of Heat and Mass Transfer Y1 - 2024 U6 - https://doi.org/10.1016/j.ijheatmasstransfer.2023.124760 SN - 0017-9310 VL - Vol. 2018 SP - 1 EP - 12 ER - TY - GEN A1 - Zanoun, El-Sayed A1 - Dewidar, Yasser A1 - Egbers, Christoph T1 - Reynolds number dependence of azimuthal and streamwise pipe flow structures T2 - Journal of Fluid Mechanics Y1 - 2023 U6 - https://doi.org/10.1017/jfm.2023.700 SN - 0022-1120 VL - Vol. 973 SP - 1 EP - 36 ER - TY - GEN A1 - Szabo, Peter A1 - Gaillard, Yann A1 - Zaussinger, Florian A1 - Egbers, Christoph T1 - Thermo-electrohydrodynamic convection in a differentially heated shell with electric central force field T2 - Proceedings in applied mathematics and mechanics : PAMM Y1 - 2023 U6 - https://doi.org/10.1002/pamm.202200121 SN - 1617-7061 N1 - 92nd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM) VL - 23 IS - 1 ER - TY - GEN A1 - Hamede, Mohammed Hussein A1 - Merbold, Sebastian A1 - Egbers, Christoph T1 - Experimental investigation of turbulent counter-rotating Taylor–Couette flows for radius ratio η = 0.1 T2 - Journal of Fluid Mechanics Y1 - 2023 U6 - https://doi.org/10.1017/jfm.2023.392 SN - 1469-7645 VL - 964 SP - A36-1 EP - A36-29 ER - TY - GEN A1 - Labarbe, Joris A1 - Le Gal, Patrice A1 - Harlander, Uwe A1 - Le Dizès, Stéphane A1 - Favier, Benjamin T1 - Localized layers of turbulence in stratified horizontally sheared Poiseuille flow T2 - Fluid Dynamics Y1 - 2023 UR - https://arxiv.org/abs/2207.09131 ER -