@inproceedings{ZaussingerEgbersKrebsetal., author = {Zaussinger, Florian and Egbers, Christoph and Krebs, Andreas and Travnikov, Vadim}, title = {New results of the spherical convection experiment Geoflow IIc}, series = {European Geosciences Union General Assembly 2017 Vienna, Austria, 23-28 April 2017}, booktitle = {European Geosciences Union General Assembly 2017 Vienna, Austria, 23-28 April 2017}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @article{HollerbachJunkEgbers, author = {Hollerbach, Rainer and Junk, M. and Egbers, Christoph}, title = {Non-axisymmetric instabilities in basic state spherical Couette flow}, language = {en} } @inproceedings{FuttererZaussingerKrebsetal., author = {Futterer, Birgit and Zaussinger, Florian and Krebs, Andreas and Egbers, Christoph}, title = {Non-linear effects and associated instabilities in spherical Rayleigh-Benard experiments with variation of the viscosity contrast}, language = {en} } @inproceedings{FuttererLarcherEgbers, author = {Futterer, Birgit and Larcher, Thomas von and Egbers, Christoph}, title = {Non-rotational and rotational regimes of spherical gap flows and their influence on thermal convection in a set-up with central force field}, language = {en} } @inproceedings{FuttererZaussingerKochetal., author = {Futterer, Birgit and Zaussinger, Florian and Koch, Sandy and Krebs, Andreas and Egbers, Christoph}, title = {Nonlinear effects and associated instabilities in iso-viscous and temperature-dependent viscous thermal convection in spherical shells, the geophysical flow simulation experiment integrated in Fluid Science Laboratory}, language = {en} } @article{Meier, author = {Meier, M.}, title = {Nonmetallic solid foams - a non-exhaustive overview}, 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} } @inproceedings{RoddaBorciaHienetal., author = {Rodda, Costanza and Borcia, Ion-Dan and Hien, Steffen and Achatz, Ulrich and Le Gal, Patrice and Harlander, Uwe}, title = {Numerical and experimental study of inertia-gravity waves in the differentially heated rotating annulus}, series = {European Geosciences Union, General Assembly 2018, Vienna, Austria, 8-13 April 2018}, booktitle = {European Geosciences Union, General Assembly 2018, Vienna, Austria, 8-13 April 2018}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @article{ScurtuStueckeEgbers, author = {Scurtu, Nicoleta and St{\"u}cke, Peter and Egbers, Christoph}, title = {Numerical and experimental study of the flow in an eccentric Couette - Taylor system with small gap}, language = {en} } @article{ScurtuBaensch, author = {Scurtu, Nicoleta and B{\"a}nsch, E.}, title = {Numerical and Stability Aspects of Non-Newtonain Fluid Flow}, language = {en} } @inproceedings{ScurtuEgbers, author = {Scurtu, Nicoleta and Egbers, Christoph}, title = {Numerical determination of the particle separation efficiency of industrial filters}, language = {en} } @inproceedings{JunkHollerbachEgbers, author = {Junk, M. and Hollerbach, Rainer and Egbers, Christoph}, title = {Numerical investigation of the flow in wide spherical gaps}, language = {en} } @misc{HerzogEgbers, author = {Herzog, Nicoleta and Egbers, Christoph}, title = {Numerical prediction of pressure drop and particle separation efficiency of some vane-type dust filters}, series = {Powder Technology}, volume = {245}, journal = {Powder Technology}, issn = {0032-5910}, doi = {10.1016/j.powtec.2013.04.050}, pages = {265 -- 272}, language = {en} } @misc{ZaussingerKupkaMontgomeryetal., author = {Zaussinger, Florian and Kupka, Friedrich and Montgomery, M. and Egbers, Christoph}, title = {Numerical simulation of DA white dwarf surface convection}, series = {Journal of physics / Conference Series}, volume = {1031}, journal = {Journal of physics / Conference Series}, number = {1}, issn = {1742-6596}, doi = {10.1088/1742-6596/1031/1/012013}, pages = {7}, language = {en} } @inproceedings{BraschSitteEgbers, author = {Brasch, W. and Sitte, B. and Egbers, Christoph}, title = {Numerical simulation of thermal convection in spherical shellsPreparation of Space experiments}, language = {en} } @inproceedings{FuttererGellertTravnikov, author = {Futterer, Birgit and Gellert, Marcus and Travnikov, Vadim}, title = {Numerical Studies for GeoFlow: Dynamics of Thermal Convection in Rotating Spherical Shells}, language = {en} } @article{StueckeScurtuEgbers, author = {St{\"u}cke, Peter and Scurtu, Nicoleta and Egbers, Christoph}, title = {Numerische Untersuchung der Sr{\"o}mung in Gleitlagern}, language = {de} } @phdthesis{Junk, author = {Junk, Markus}, title = {Numerische Untersuchung der Stabilit{\"a}t der Str{\"o}mung im weiten Kugelspalt}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttngen}, isbn = {3-86537-345-3}, language = {de} } @article{BraschSitteEgbers, author = {Brasch, W. and Sitte, B. and Egbers, Christoph}, title = {Numerische Untersuchung der thermischen Konvektion in einer weiten Kugelschale}, language = {de} } @inproceedings{Egbers, author = {Egbers, Christoph}, title = {Observation of Nanoparticle Aggregation in a tube flow under microgravity conditions}, series = {34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA., meeting abstract}, booktitle = {34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA., meeting abstract}, language = {en} } @inproceedings{ZanounKoenigAlMutairietal., author = {Zanoun, El-Sayed and K{\"o}nig, Franziska and Al-Mutairi, Fahad M. and Egbers, Christoph and {\"O}ng{\"u}ner, Emir}, title = {On the Application of Hot Wires and Pitot Tubes in Pipe and Channel Flows}, series = {HEFAT 2014, 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, 6 - 9 July 2014 Orlando, Florida}, booktitle = {HEFAT 2014, 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, 6 - 9 July 2014 Orlando, Florida}, doi = {10.13140/2.1.3766.7521}, pages = {7}, language = {en} } @misc{KoenigZanounJehringetal., author = {K{\"o}nig, Franziska and Zanoun, El-Sayed and Jehring, Lothar and Egbers, Christoph}, title = {On the behavior of the inner peak in turbulent pipe flow}, language = {en} } @inproceedings{BonczekEgbers, author = {Bonczek, P. and Egbers, Christoph}, title = {On the influence of thermal convection in classical Taylor-Couette flows}, language = {en} } @inproceedings{MalteseMelettideOliveiraRaspoSeeligetal., author = {Maltese Meletti de Oliveira, Gabriel and Raspo, Isabelle and Seelig, Torsten and Viazzo, Stephane and Randriamampianina, Anthony and Abide, St{\´e}phane and Krebs, Andreas and Harlander, Uwe}, title = {On the instability of radially sheared and axially stratified vortex flow}, series = {European Geosciences Union, General Assembly 2018, Vienna, Austria}, booktitle = {European Geosciences Union, General Assembly 2018, Vienna, Austria}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{LarcherFuttererEgbers, author = {Larcher, Thomas von and Futterer, Birgit and Egbers, Christoph}, title = {On the status of experimental preparation of spherical gap flow experiments with central force field on International Space Station (ISS)}, language = {en} } @inproceedings{ZanounOenguenerEgbersetal., author = {Zanoun, El-Sayed and {\"O}ng{\"u}ner, Emir and Egbers, Christoph and Bellani, Gabriele and Talamelli, Alessandro}, title = {One-Dimensional Flow Spectra and Cumulative Energy from Two Pipe Facilities}, series = {iTi 2018 Conference on Turbulence VIII, September 5-7, 2018, Bertinoro, Italy, Book of abstract}, booktitle = {iTi 2018 Conference on Turbulence VIII, September 5-7, 2018, Bertinoro, Italy, Book of abstract}, pages = {S. 100}, language = {en} } @inproceedings{SeeligJongmannsMeyeretal., author = {Seelig, Torsten and Jongmanns, Marcel and Meyer, Antoine and Meier, Martin and Egbers, Christoph}, title = {Onset of dielectrophoretic force-driven convection in annular geometry under Earth's gravity}, series = {20th International Couette-Taylor Workshop, 11-13 July 2018, Marseille, France, Book of abstracts}, booktitle = {20th International Couette-Taylor Workshop, 11-13 July 2018, Marseille, France, Book of abstracts}, pages = {2}, language = {en} } @article{BrucksSitteEgbers, author = {Brucks, A. and Sitte, B. and Egbers, Christoph}, title = {Onset of thermal convection and influence of rotation in wide spherical gaps}, language = {en} } @inproceedings{MerboldBrauckmannEgbers, author = {Merbold, Sebastian and Brauckmann, Hannes and Egbers, Christoph}, title = {Optimal angular momentum flux of wide gap Taylor-Couette flow}, series = {Book of abstracts, 9th European Fluid Mechanics Conference (EFMC), 9-13 September, Rome, Italy}, booktitle = {Book of abstracts, 9th European Fluid Mechanics Conference (EFMC), 9-13 September, Rome, Italy}, language = {en} } @incollection{HarlanderLarcherWrightetal., author = {Harlander, Uwe and Larcher, Thomas von and Wright, G. B. and Hoff, Michael and Alexandrov, Kiril and Egbers, Christoph}, title = {Orthogonal decomposition methods to analyze PIV, LDV and thermography data of a thermally driven rotating annulus laboratory experiment}, series = {Modeling Atmospheric and Oceanic Flows: Insights from Laboratory Experiments and Numerical Simulations}, booktitle = {Modeling Atmospheric and Oceanic Flows: Insights from Laboratory Experiments and Numerical Simulations}, editor = {Larcher, Thomas von and Williams, Paul D.}, publisher = {Wiley}, address = {Hoboken}, isbn = {978-1-118-85593-5}, doi = {10.1002/9781118856024}, pages = {315 -- 336}, language = {en} } @misc{DahleyFuttererEgbersetal., author = {Dahley, Norman and Futterer, Birgit and Egbers, Christoph and Crumeyrolle, Olivier and Mutabazi, Innocent}, title = {Parabolic flight experiment "Convection in a Cylinder" : Convection patterns in varying buoyancy forces}, series = {Journal of Physics: Conference Series}, volume = {318}, journal = {Journal of Physics: Conference Series}, issn = {1742-6588}, doi = {10.1088/1742-6596/318/8/082003}, pages = {082003}, language = {en} } @phdthesis{Shen, author = {Shen, Jianqi}, title = {Particle Size Analysis by Transmission Fluctuation Spectrometry: Fundamentals and Case Studies}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {3-89873-946-5}, language = {en} } @incollection{DetersGliemannEgbers, author = {Deters, T. and Gliemann, S. and Egbers, Christoph}, title = {Particle-Image-Velocimetry unter Einsatz von thermochromen Fl{\"u}ssigkristallen}, language = {en} } @inproceedings{RistauMeierEgbersetal., author = {Ristau, R. and Meier, M. and Egbers, Christoph and Schmidt, J.-R. and Poppe, T.}, title = {Partikelbeladene Str{\"o}mungen : Simulation und Messtechnik}, language = {de} } @article{FuttererHollerbachEgbers, author = {Futterer, Birgit and Hollerbach, Rainer and Egbers, Christoph}, title = {Periodical convective flow in spherical shells}, language = {en} } @inproceedings{MerboldHarlanderEgbers, author = {Merbold, Sebastian and Harlander, Uwe and Egbers, Christoph}, title = {Physics of rotating fluids, a DFG core facility centre}, series = {88th Annual Meeting of the International Association of Applied Mathematics and Mechanics GAMM, March 6-10, 2017, Weimar, Germany, Book of abstracts}, booktitle = {88th Annual Meeting of the International Association of Applied Mathematics and Mechanics GAMM, March 6-10, 2017, Weimar, Germany, Book of abstracts}, pages = {S. 355}, 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{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} } @inproceedings{SeeligBurchardtKrebsetal., author = {Seelig, Torsten and Burchardt, Martin and Krebs, Andreas and Harlander, Uwe and Egbers, Christoph}, title = {PIV measurements in an axially stratified Taylor-Couette experiment}, series = {Book of abstracts, School ISTROF 2016, Instabilities and Turbulence in Strato-Rotational Flows, July 11-13th, 2016, Le Havre}, booktitle = {Book of abstracts, School ISTROF 2016, Instabilities and Turbulence in Strato-Rotational Flows, July 11-13th, 2016, Le Havre}, language = {en} } @inproceedings{SmieszekAbchaMutabazietal., author = {Smieszek, Marlene and Abcha, N. and Mutabazi, Innocent and Egbers, Christoph}, title = {PIV measurements in viscoelastic polyacrylamide solution in Taylor-Couette system}, language = {en} } @incollection{FroitzheimMerboldEgbers, author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph}, title = {PIV Messungen in einer Taylor-Couette Str{\"o}mung mit weitem Spalt}, series = {Lasermethoden in der Str{\"o}mungsmesstechnik, 23. Fachtagung, 8. - 10. September 2015, Dresden}, booktitle = {Lasermethoden in der Str{\"o}mungsmesstechnik, 23. Fachtagung, 8. - 10. September 2015, Dresden}, publisher = {GALA}, address = {Karlsruhe}, isbn = {978-3-9816764-1-9}, pages = {S. 27}, language = {de} } @misc{HarlanderLarcherWangetal., author = {Harlander, Uwe and Larcher, Thomas von and Wang, Yongtai and Egbers, Christoph}, title = {PIV- and LDV-measurements of baroclinic wave interactions in a thermally driven rotating annulus}, doi = {10.1007/s00348-009-0792-5}, 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{ScurtuFuttererEgbers, author = {Scurtu, Nicoleta and Futterer, Birgit and Egbers, Christoph}, title = {Pulsating and traveling wave modes of natural convection in spherical shells}, language = {en} } @incollection{FuttererEgbers, author = {Futterer, Birgit and Egbers, Christoph}, title = {Quasi-stationary and chaotic convection in low rotating spherical shells}, series = {Advances in turbulence XII, proceedings of the 12th EUROMECH European Turbulence Conference, September, 2009, Marburg, Germany}, booktitle = {Advances in turbulence XII, proceedings of the 12th EUROMECH European Turbulence Conference, September, 2009, Marburg, Germany}, editor = {Eckhardt, Bruno}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {978-3-642-03084-0}, pages = {97 -- 101}, language = {en} } @inproceedings{SitteImmohrHinrichsetal., author = {Sitte, B. and Immohr, J. and Hinrichs, O. and Meier, R. and Egbers, Christoph and Rath, H. J.}, title = {Rayleigh-Benard convection in dielectrophoretic force fields}, language = {en} } @misc{GrimmStreleKupkaLoewBasellietal., author = {Grimm-Strele, Hannes and Kupka, Friedrich and L{\"o}w-Baselli, Bernhard and Mundprecht, Eva and Zaussinger, Florian and Schiansky, Peter}, title = {Realistic simulations of stellar surface convection with ANTARES: I. Boundary conditions and model relaxation}, series = {New Astronomy}, volume = {34}, journal = {New Astronomy}, issn = {1384-1076}, doi = {10.1016/j.newast.2013.11.005}, pages = {278 -- 293}, language = {en} } @inproceedings{HarlanderWrightEgbers, author = {Harlander, Uwe and Wright, G. B. and Egbers, Christoph}, title = {Reconstruction of the 3D flow field in a differentially heated rotating annulus by synchronized particle image velocimetry and infrared thermography measurements}, series = {16th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 09-12 July, Proceedings, Calouste Gulbenkian Foundation, Lisbon, Portugal}, booktitle = {16th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 09-12 July, Proceedings, Calouste Gulbenkian Foundation, Lisbon, Portugal}, language = {en} } @inproceedings{HarlanderWrightEgbers, author = {Harlander, Uwe and Wright, G. B. and Egbers, Christoph}, title = {Reconstruction of the 3D flow field in a differentially heated rotating annulus laboratory experiment}, series = {European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April}, booktitle = {European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April}, language = {en} } @incollection{JehringZanoun, author = {Jehring, Lothar and Zanoun, El-Sayed}, title = {Reducing environmental impact by mean of active flow control}, 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} } @misc{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 on aerosol particle transport for dynamic situations}, series = {tm - Technisches Messen}, volume = {90}, journal = {tm - Technisches Messen}, number = {5}, issn = {2196-7113}, doi = {10.1515/teme-2022-0118}, pages = {13}, language = {en} } @misc{ZanounDurstNagib, author = {Zanoun, El-Sayed and Durst, F. and Nagib, H. M.}, title = {Refined Cf relation for turbulent channels and consequences for high Re experiments}, language = {en} } @article{ZanounDurstNagib, author = {Zanoun, El-Sayed and Durst, F. and Nagib, H. M.}, title = {Response to "Comment on 'Evaluating the law of the wall in two-dimensional fully developed turbulent channel flows' "}, 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{HarlanderWenzelEgbers, author = {Harlander, Uwe and Wenzel, Julia and Egbers, Christoph}, title = {Rotating annulus laboratory experiments with application to baroclinic channel flows with narrows}, 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} } @incollection{ZanounDurstNagib, author = {Zanoun, El-Sayed and Durst, F. and Nagib, H. M.}, title = {Scaling Laws for Turbulent Channel and Pipe Flows over a Wide Range of Reynolds Number}, language = {de} } @inproceedings{AugensteinLeopoldRichard, author = {Augenstein, Edgar and Leopold, F. and Richard, H.}, title = {Schlieren Techniques in Comparison The Background Oriented Method versus Visualization with Holographic Filters}, language = {en} } @misc{KupkaLoschZaussingeretal., author = {Kupka, Friedrich and Losch, Martin and Zaussinger, Florian and Zweigle, Thomas}, title = {Semi-convection in the ocean and in stars: A multi-scale analysis}, series = {Meteorologische zeitschrift}, volume = {24}, journal = {Meteorologische zeitschrift}, number = {3}, issn = {0941-2948}, doi = {10.1127/metz/2015/0643}, pages = {343 -- 358}, abstract = {Fluid stratified by gravitation can be subject to a number of instabilities which eventually lead to a flow that causes enhanced mixing and transport of heat. The special case where a destabilizing temperature gradient counteracts the action of a stabilizing gradient in molecular weight is of interest to astrophysics (inside stars and giant planets) and geophysics (lakes, oceans) as well as to some engineering applications. The detailed dynamics of such a system depend on the molecular diffusivities of heat, momentum, and solute as well as system parameters including the ratio of the two gradients to each other. Further important properties are the formation and merging of well-defined layers in the fluid which cannot be derived from linear stability analysis. Moreover, the physical processes operate on a vast range of length and time scales. This has made the case of semi-convection, where a mean temperature gradient destabilizes the stratification while at the same time the mean molecular gradient tends to stabilize it, a challenge to physical modelling and to numerical hydrodynamical simulation. During the MetStr{\"o}m project the simulation codes ANTARES and MITgcm have been extended such that they can be used for the simulations of such flows. We present a comparison of effective diffusivities derived from direct numerical simulations. For both stars and the oceanic regimes, the Nusselt numbers (scaled diffusivities) follow similar relationships. Semi-convection quickly becomes inefficient, because the formation of layers limits vertical mixing. In contrast to the complementary saltfingering, these layers tend to damp instabilities so that effective diffusivities of salinity (concentration) are up to two orders of magnitudes smaller than in the former case.}, language = {en} } @misc{ZaussingerKupkaEgbersetal., author = {Zaussinger, Florian and Kupka, Friedrich and Egbers, Christoph and Neben, Matthias and H{\"u}cker, S. and Bahr, C. and Schmitt, M.}, title = {Semi-convective layer formation}, series = {Journal of Physics: Conference Series}, volume = {837}, journal = {Journal of Physics: Conference Series}, number = {1}, doi = {10.1088/1742-6596/837/1/012012}, pages = {7}, language = {en} } @misc{Zaussinger, author = {Zaussinger, Florian}, title = {Semiconvection}, language = {de} } @misc{Zaussinger, author = {Zaussinger, Florian}, title = {Semiconvection}, language = {en} } @misc{FuttererKrebsPlesaetal., author = {Futterer, Birgit and Krebs, Andreas and Plesa, Ana-Catalina and Zaussinger, Florian and Hollerbach, Rainer and Breuer, Doris and Egbers, Christoph}, title = {Sheet-like and plume-like thermal flow in a spherical convection experiment performed under microgravity}, series = {Journal of Fluid Mechanics}, volume = {vol. 735}, journal = {Journal of Fluid Mechanics}, issn = {1750-6859}, doi = {10.1017/jfm.2013.507}, pages = {647 -- 683}, language = {en} } @inproceedings{EgbersZaussinger, author = {Egbers, Christoph and Zaussinger, Florian}, title = {Simulation of geophysical fluid flows in spherical shells: The Geoflow experiments on ISS}, series = {Book of abstracts, School ISTROF 2016, Instabilities and Turbulence in Strato-Rotational Flows, July 11-13th, 2016, Le Havre}, booktitle = {Book of abstracts, School ISTROF 2016, Instabilities and Turbulence in Strato-Rotational Flows, July 11-13th, 2016, Le Havre}, language = {en} } @inproceedings{EgbersHollerbachChossat, author = {Egbers, Christoph and Hollerbach, Rainer and Chossat, P.}, title = {Simulation of geophysical fluid flows under microgravity}, language = {en} } @inproceedings{Egbers, author = {Egbers, Christoph}, title = {Simulation of Geophysical Fluid Flows under Microgravity (GeoFlow): Flow diagnostics and experiment concept for Fluid Science experiments}, series = {Proceedings of 11th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, 8-11th July 2002}, booktitle = {Proceedings of 11th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, 8-11th July 2002}, pages = {5}, 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{HarlanderWenzelWangetal., author = {Harlander, Uwe and Wenzel, Julia and Wang, Yongtai and Alexandrov, Kiril and Egbers, Christoph}, title = {Simultaneous PIV- and thermography-measurements of partially blocked flow in a heated rotating annulus}, language = {en} } @misc{HarlanderWenzelAlexandrovetal., author = {Harlander, Uwe and Wenzel, Julia and Alexandrov, Kiril and Wang, Yongtai and Egbers, Christoph}, title = {Simultaneous PIV- and thermography-measurements of partially blocked flow in a heated rotating annulus}, series = {Experiments in Fluids}, volume = {52}, journal = {Experiments in Fluids}, number = {4}, issn = {1432-1114}, doi = {10.1007/s00348-011-1195-y}, pages = {1077 -- 1087}, language = {de} } @misc{HarlanderSeeligFaulwetter, author = {Harlander, Uwe and Seelig, Torsten and Faulwetter, Robin}, title = {Singular vector growth in different flow regimes of the differentially heated rotating annulus}, language = {en} } @inproceedings{LarcherViazzoRandriamampianinaetal., author = {Larcher, Thomas von and Viazzo, Stephane and Randriamampianina, Anthony and Harlander, Uwe}, title = {Small-scale flow patterns at the vertical sidewalls of the thermally driven rotating annulus}, series = {European Geosciences Union General Assembly 2017 Vienna, Austria, 23-28 April 2017}, booktitle = {European Geosciences Union General Assembly 2017 Vienna, Austria, 23-28 April 2017}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{AlexandrovHarlanderEgbers, author = {Alexandrov, Kiril and Harlander, Uwe and Egbers, Christoph}, title = {Spatial spectra of regular and irregular rotating annulus flows: Statistical scale classification in terms of empirical orthogonal functions}, language = {en} } @misc{ZanounOenguenerShahirpouretal., author = {Zanoun, El-Sayed and {\"O}ng{\"u}ner, Emir and Shahirpour, Amir and Merbold, Sebastian and Egbers, Christoph}, title = {Spectral Analysis of Large Scale Structures in Fully Developed Turbulent Pipe Flow}, series = {Proceedings in applied mathematics and mechanics : PAMM}, volume = {17}, journal = {Proceedings in applied mathematics and mechanics : PAMM}, number = {1}, issn = {1617-7061}, doi = {10.1002/pamm.201710293}, pages = {647 -- 650}, language = {en} } @inproceedings{EgbersShahirpourOengueneretal., author = {Egbers, Christoph and Shahirpour, Amir and {\"O}ng{\"u}ner, Emir and Zanoun, El-Sayed}, title = {Spectral Analysis of Large Scale Structures in Fully Developed Turbulent Pipe Flow}, series = {88th Annual Meeting of the International Association of Applied Mathematics and Mechanics GAMM, March 6-10, 2017, Weimar, Germany, Book of abstracts}, booktitle = {88th Annual Meeting of the International Association of Applied Mathematics and Mechanics GAMM, March 6-10, 2017, Weimar, Germany, Book of abstracts}, pages = {S. 46}, language = {en} } @inproceedings{FruehSzaboSeeligetal., author = {Fr{\"u}h, Wolf-Gerrit and Szabo, Peter and Seelig, Torsten and Hoff, Michael and Egbers, Christoph}, title = {Spectral Features of the transition to structural vacillation in the baroclinic annulus}, series = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, booktitle = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, address = {Cottbus}, pages = {36 -- 37}, language = {en} } @incollection{KochDahleyFuttereretal., author = {Koch, Sandy and Dahley, Norman and Futterer, Birgit and Egbers, Christoph}, title = {Sph{\"a}rische Wollaston-Schlieren-Interferometrie: Raum-Zeit-Analyse von unter- und {\"u}berkritischer Konvektion im rotierenden Kugelspalt (GeoFlow-Experiment)}, language = {de} } @inproceedings{MeinckeEgbersScurtuetal., author = {Meincke, Oliver and Egbers, Christoph and Scurtu, Nicoleta and B{\"a}nsch, E.}, title = {Stability and dynamics in asymmetric Taylor-Couette flow}, 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} } @article{TravnikovRathEgbers, author = {Travnikov, Vadim and Rath, H. J. and Egbers, Christoph}, title = {Stability of natural convection between spherical shells: Energy Theory}, language = {en} } @inproceedings{TappeMeier, author = {Tappe, Stephanie and Meier, M.}, title = {Stability of Three-Phase-Foams - an Experimental Approach}, series = {A collection of papers presented at the 5th European Conference on Foams, Emulsions, and Applications, EUFOAM 2004}, booktitle = {A collection of papers presented at the 5th European Conference on Foams, Emulsions, and Applications, EUFOAM 2004}, editor = {Vignes-Adler, Mich{\`e}le}, publisher = {Elsevier}, address = {Amsterdam [u.a.]}, 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} } @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} } @phdthesis{Hoff, author = {Hoff, Michael}, title = {Stewartson layers, inertial waves and wave instabilities in a spherical-gap flow: Laboratory experiments with full optical acces}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-9644-1}, language = {en} } @inproceedings{HarlanderSeeligGellertetal., author = {Harlander, Uwe and Seelig, Torsten and Gellert, Marcus and Viazzo, Stephane and Randriamampianina, Anthony and Egbers, Christoph and R{\"u}diger, G{\"u}nther}, title = {Stratorotational instability in a thermally stratified taylor-couette flow}, series = {European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015}, booktitle = {European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{HarlanderSeeligGellertetal., author = {Harlander, Uwe and Seelig, Torsten and Gellert, Marcus and Viazzo, Stephane and Randriamampianina, Anthony and Egbers, Christoph and R{\"u}diger, G{\"u}nther}, title = {Stratorotational instability: nonlinear aspects at higher reynolds numbers}, series = {EUROMECH Colloquium 567, Turbulent mixing in stratified flows 22-25 March 2015, DAMTP, Centre for Mathematical Sciences, Cambridge}, booktitle = {EUROMECH Colloquium 567, Turbulent mixing in stratified flows 22-25 March 2015, DAMTP, Centre for Mathematical Sciences, Cambridge}, pages = {1}, language = {en} } @inproceedings{HarlanderSeeligStapelfeldetal., author = {Harlander, Uwe and Seelig, Torsten and Stapelfeld, Ludwig and Gellert, Marcus and Viazzo, Stephane and Randriamampianina, Anthony and Egbers, Christoph and R{\"u}diger, G{\"u}nther}, title = {Stratorotational Instability: nonlinear aspects at higher Reynolds numbers}, series = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, booktitle = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, address = {Cottbus}, pages = {132 -- 133}, language = {en} } @inproceedings{OenguenerZanounEgbers, author = {{\"O}ng{\"u}ner, Emir and Zanoun, El-Sayed and Egbers, Christoph}, title = {Streamwise Auto-Correlation Analysis in Turbulent Pipe Flow Using Particle Image Velocimetry at High Reynolds Numbers}, series = {Progress in Turbulence VII, Proceedings of the iTi Conference in Turbulence 2016}, booktitle = {Progress in Turbulence VII, Proceedings of the iTi Conference in Turbulence 2016}, editor = {{\"O}rl{\"u}, Ramis and Talamelli, Alessandro and Peinke, Joachim and Oberlack, Martin}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-57933-7}, pages = {107 -- 112}, language = {en} } @incollection{OenguenerZanounKoenigetal., author = {{\"O}ng{\"u}ner, Emir and Zanoun, El-Sayed and K{\"o}nig, Franziska and Egbers, Christoph}, title = {Structure Investigation in Pipe Flow at High Reynolds Numbers}, publisher = {Springer}, address = {Berlin}, isbn = {978-3-319-29130-7}, pages = {217 -- 220}, language = {en} } @phdthesis{Smieszek, author = {Smieszek, Marlene}, title = {Structures and stability of Newtonian and non-Newtonian fluids in Taylor-Couette system}, publisher = {D{\"u}sseldorf : VDI-Verl}, isbn = {978-3-18-349107-0}, language = {en} } @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} } @inproceedings{SeeligHarlanderKielczewskietal., author = {Seelig, Torsten and Harlander, Uwe and Kielczewski, Kamil and Tuliszka-Sznitko, Ewa M. and Bontoux, Patrick and Egbers, Christoph}, title = {Study of transitional and turbulent flows in rotor/stator cavities}, series = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, booktitle = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, address = {Cottbus}, pages = {118 -- 119}, language = {en} } @misc{HoffHarlanderTriana, author = {Hoff, Michael and Harlander, Uwe and Triana, Santiago Andr{\´e}s}, title = {Study of turbulence and interacting inertial modes in a differentially rotating sphericel shell experiment}, series = {Physical Review Fluids}, volume = {1}, journal = {Physical Review Fluids}, number = {4}, doi = {10.1103/PhysRevFluids.1.043701}, pages = {043701}, language = {en} } @inproceedings{BorciaBestehornEgbers, author = {Borcia, Rodica and Bestehorn, Michael and Egbers, Christoph}, title = {Surface effects at the mixing of two perfectly miscible components in a thin liquid film}, series = {International Topical Team Workshop on Two-Phase Systems for Ground and Space Applications, ITTW 2013}, booktitle = {International Topical Team Workshop on Two-Phase Systems for Ground and Space Applications, ITTW 2013}, language = {en} } @inproceedings{BorciaBorciaBestehornetal., author = {Borcia, Ion-Dan and Borcia, Rodica and Bestehorn, Michael and Xu, Wenchao and Harlander, Uwe}, title = {Surface waves generated by libration in a circular channel}, series = {The 12th European Fluid Mechanics Conference, 9 September 2018 - 13 September 2018, Vienna, Austria}, booktitle = {The 12th European Fluid Mechanics Conference, 9 September 2018 - 13 September 2018, Vienna, Austria}, pages = {1}, language = {en} } @misc{VeenHuismanMerboldetal., author = {Veen, Roeland C. A. van der and Huisman, Sander G. and Merbold, Sebastian and Harlander, Uwe and Egbers, Christoph and Lohse, Detlef and Sun, Chao}, title = {Taylor Couette turbulence at radius ratio =0,5:scaling, flow structures and plumes}, series = {Journal of Fluid Mechanics}, volume = {799}, journal = {Journal of Fluid Mechanics}, issn = {1469-7645}, doi = {10.1017/jfm.2016.352}, pages = {334 -- 351}, language = {en} } @inproceedings{HollerbachTuckerman, author = {Hollerbach, Rainer and Tuckerman, L. S.}, title = {Taylor vortices in wide spherical shells}, language = {en} } @misc{SeeligKielczewskiTuliszkaSznitkoetal., author = {Seelig, Torsten and Kielczewski, Kamil and Tuliszka-Sznitko, Ewa M. and Harlander, Uwe and Egbers, Christoph and Bontoux, Patrick}, title = {Taylor-Couette flow with asymmetric end-walls boundary conditions}, series = {15th European turbulence conference (ETC), Delft, The Netherlands (2015)}, journal = {15th European turbulence conference (ETC), Delft, The Netherlands (2015)}, language = {en} } @inproceedings{SmieszekEgbers, author = {Smieszek, Marlene and Egbers, Christoph}, title = {Taylor-Couette Str{\"o}mung von nicht -Newtonschen Fluiden}, language = {de} } @inproceedings{FroitzheimMerboldEgbers, author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph}, title = {Taylor-Couette turbulenz at wide and very wide gap}, series = {Experimentelle Str{\"o}mungsmechanik, 24. Fachtagung 6.-8. September 2016 Cottbus}, booktitle = {Experimentelle Str{\"o}mungsmechanik, 24. Fachtagung 6.-8. September 2016 Cottbus}, editor = {Egbers, Christoph}, publisher = {German Association for Laser Anemometry GALA e.V.}, address = {Karlruhe}, isbn = {978-3-9816764-2-6}, pages = {S. 14}, language = {en} }