@misc{TranStathopoulos, author = {Tran, A. Phong and Stathopoulos, Panagiotis}, title = {Dynamic simulation and experimental validation of a high-temperature Brayton heat pump}, series = {Applied thermal engineering}, volume = {274, Part B}, journal = {Applied thermal engineering}, publisher = {Elsevier BV}, address = {Amsterdam}, issn = {1359-4311}, doi = {10.1016/j.applthermaleng.2025.126536}, pages = {1 -- 13}, abstract = {The decarbonization of industrial process heating will require widespread adoption of high-temperature heat pumps. Brayton cycle heat pumps are capable of providing heat at temperatures that currently cannot be achieved by conventional vapor-compression cycle heat pumps. However, significant challenges remain in adapting these systems to industrial applications, particularly with regard to operational safety, control strategies, and flexibility in response to varying operational conditions. This study presents a dynamic model of a closed-loop Brayton cycle heat pump capable of producing temperatures of 250 °C and higher, validated using experimental data. The physics-based model implemented in Modelica captures key thermodynamic processes and system dynamics, including thermal inertia and volume dynamics. An optimization-based method is used to calibrate model parameters, minimizing the error between measured and simulated data. Given the significant impact of the compressor on overall heat pump performance, a novel calibration method is introduced to adjust an existing compressor map using limited measurement data. This approach ensures that the compressor behavior is represented with sufficient accuracy, smoothness, and numerical robustness. The calibrated model achieves mean-normalized root mean squared errors (NRMSE) ranging from 0.12 \% to 1.46 \% for temperatures, pressures, and mass flow rates. The model is applied to examine the system's start-up and deceleration sequences, offering insights into compressor stability and heat exchanger temperature profiles. These results demonstrate the model's utility for control design, performance evaluation, and stability analysis.}, language = {en} } @incollection{LarcherEgbers, author = {Larcher, Thomas von and Egbers, Christoph}, title = {Dynamics of baroclinic instabilities using methods of non-linear time series analysis}, language = {en} } @article{Larcher, author = {Larcher, Thomas von}, title = {Dynamics of baroclinic wave pattern in transition zones between different flow regimes}, language = {en} } @inproceedings{StueckeLehmannScurtuetal., author = {St{\"u}cke, Peter and Lehmann, B. and Scurtu, Nicoleta and Egbers, Christoph}, title = {Eccentric Couette Flow with Superimposed Crossflow}, language = {en} } @article{StueckeLehmannScurtuetal., author = {St{\"u}cke, Peter and Lehmann, B. and Scurtu, Nicoleta and Egbers, Christoph}, title = {Eccentric Couette Flow with Superimposed Crossflow}, language = {en} } @inproceedings{ChristlHerzogEgbers, author = {Christl, Andreas and Herzog, Nicoleta and Egbers, Christoph}, title = {Eccentric Taylor-Couette Flow with orbital motion of the inner cylinder}, language = {en} } @inproceedings{ChristlHerzogEgbers, author = {Christl, Andreas and Herzog, Nicoleta and Egbers, Christoph}, title = {Eccentric Taylor-Couette Flow with orbital motion of the inner cylinder}, language = {en} } @inproceedings{ChristlGorenzHerzogetal., author = {Christl, Andreas and Gorenz, Paul and Herzog, Nicoleta and Egbers, Christoph}, title = {Eccentric Taylor-Couette Flow with orbital motion of the inner cylinder}, language = {en} } @inproceedings{ChristlScurtuEgbers, author = {Christl, Andreas and Scurtu, Nicoleta and Egbers, Christoph}, title = {Eccentrically Taylor-Couette Flow with orbital motion of the inner cylinder}, language = {en} } @article{HarlanderWillKurganskyetal., author = {Harlander, Uwe and Will, Andreas and Kurgansky, Michael V. and Ehrendorfer, M.}, title = {Editorial: Topics in modern geophysical fluid dynamics}, language = {en} } @misc{HallolYousryMerboldetal., author = {Hallol, Zeinab and Yousry, Mohamed and Merbold, Sebastian and Egbers, Christoph}, title = {Effect of High Reynolds Number on the Behaviour of Large and Very Large Scale Motions in Fully Developed Turbulent Pipe Flow}, series = {Fluid Dynamics}, volume = {57}, journal = {Fluid Dynamics}, number = {4}, issn = {0015-4628}, doi = {10.1134/S0015462822040048}, pages = {524 -- 537}, language = {en} } @misc{SzaboFrueh, author = {Szabo, Peter and Fr{\"u}h, Wolf-Gerrit}, title = {Effect of intrinsic thermomagnetic convective timescales on the response to periodic modulation of external forcing parameters}, series = {European Fluid Mechanics Conference EFMC14}, journal = {European Fluid Mechanics Conference EFMC14}, pages = {35}, language = {en} } @inproceedings{MeyerYoshikawaMutabazietal., author = {Meyer, Antoine and Yoshikawa, Harunori and Mutabazi, Innocent and Egbers, Christoph}, title = {Effect of the dielectrophoretic force in a rigidly rotating cylindrical annulus}, series = {20th International Couette-Taylor Workshop, 11-13 July 2018, Marseille, France, Book of abtracts}, booktitle = {20th International Couette-Taylor Workshop, 11-13 July 2018, Marseille, France, Book of abtracts}, pages = {2}, language = {en} } @misc{MeyerMeierJongmannsetal., author = {Meyer, Antoine and Meier, Martin and Jongmanns, Marcel and Seelig, Torsten and Egbers, Christoph and Mutabazi, Innocent}, title = {Effect of the Initial Conditions on the Growth of Thermoelectric Instabilities During Parabolic}, series = {Microgravity Science and Technology}, volume = {31}, journal = {Microgravity Science and Technology}, number = {5}, issn = {1875-0494}, doi = {10.1007/s12217-019-09755-1}, pages = {715 -- 721}, language = {en} } @misc{NobisReinkeSchmidtetal., author = {Nobis, Matthias and Reinke, Peter and Schmidt, Marcus and Egbers, Christoph}, title = {Einfluss der Wellenverlagerung auf das Str{\"o}mungsfeld im Schmierspalt eines Gleitlagermodells}, series = {Experimentelle Str{\"o}mungsmechanik, 24. Fachtagung 6.-8. September 2016 Cottbus}, journal = {Experimentelle Str{\"o}mungsmechanik, 24. Fachtagung 6.-8. September 2016 Cottbus}, editor = {Egbers, Christoph}, publisher = {German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-2-6}, pages = {S. 29}, language = {de} } @inproceedings{HarlanderHoffSeeligetal., author = {Harlander, Uwe and Hoff, Michael and Seelig, Torsten and Egbers, Christoph}, title = {Empirical singular vectors of baroclinic flows deduced from experimental data}, series = {European Geosciences Union (EGU), 10th General Assembly, Vienna, Austria, 07 - 12 April 2013}, booktitle = {European Geosciences Union (EGU), 10th General Assembly, Vienna, Austria, 07 - 12 April 2013}, language = {en} } @misc{HoffHarlanderEgbers, author = {Hoff, Michael and Harlander, Uwe and Egbers, Christoph}, title = {Empirical singular vectors of baroclinic flows deduced from experimental data of a differentially heated rotating annulus}, series = {Meteorologische Zeitschrift}, volume = {23}, journal = {Meteorologische Zeitschrift}, number = {6}, doi = {10.1127/metz/2014/0563}, pages = {581 -- 597}, language = {en} } @inproceedings{MeierEgbersMutabazietal., author = {Meier, Martin and Egbers, Christoph and Mutabazi, Innocent and Meyer, Antoine and Seelig, Torsten and Jongmanns, Marcel}, title = {Enhanced Heat transfer in a cylindrical annulus under 1g and low-g conditions}, series = {69th International Astronautical Congress, 1 - 5 October 2018, Bremen, Germany}, booktitle = {69th International Astronautical Congress, 1 - 5 October 2018, Bremen, Germany}, pages = {1}, language = {en} } @misc{HasanuzzamanMerboldMotuzetal., author = {Hasanuzzaman, Gazi and Merbold, Sebastian and Motuz, Vasyl and Egbers, Christoph}, title = {Enhanced outer peaks in turbulent boundary layer using uniform blowing at moderate Reynolds number}, series = {Journal of Turbulence}, volume = {23}, journal = {Journal of Turbulence}, number = {1-2}, issn = {1468-5248}, doi = {10.1080/14685248.2021.2014058}, pages = {68 -- 95}, language = {en} } @misc{HasanuzzamanEivaziMerboldetal., author = {Hasanuzzaman, Gazi and Eivazi, Hamidreza and Merbold, Sebastian and Egbers, Christoph and Vinuesa, Ricardo}, title = {Enhancement of PIV measurements via physics-informed neural networks}, series = {Measurement Science and Technology}, journal = {Measurement Science and Technology}, issn = {1361-6501}, doi = {10.1088/1361-6501/aca9eb}, language = {en} } @inproceedings{HickelAugensteinEgbers, author = {Hickel, Stefan and Augenstein, Edgar and Egbers, Christoph}, title = {Entwicklung einer Echt-Dreidimensionalen Particle Image Velocimetry}, series = {Lasermethoden in der Str{\"o}mungsmesstechnik, 11. Fachtagung, 9. bis 11. September 2003 in Braunschweig}, booktitle = {Lasermethoden in der Str{\"o}mungsmesstechnik, 11. Fachtagung, 9. bis 11. September 2003 in Braunschweig}, editor = {Dopheide, Dietrich and M{\"u}ller, Harald and Strunck, Volker and Ruck, Bodo and Leder, Alfred}, publisher = {PTB}, address = {Braunschweig}, isbn = {3-00-011903-5}, pages = {39.1 -- 39.6}, language = {de} } @inproceedings{FechtmannWedemeyerMahnkenetal., author = {Fechtmann, C. and Wedemeyer, Th. and Mahnken, M. and Immohr, J. and Egbers, Christoph and Rath, H. J.}, title = {Entwicklung miniaturisierter Laser-Doppler-Anemometer Systeme}, language = {de} } @inproceedings{ZanounEgbersGuoetal., author = {Zanoun, El-Sayed and Egbers, Christoph and Guo, Xiaoai and Riebel, Ulrich}, title = {Experimental and Numerical Investigations of Isothermal Fluid-Particle Flows in Vertical Cuvette}, language = {en} } @misc{ZanounEgbersOerlietal., author = {Zanoun, El-Sayed and Egbers, Christoph and {\"O}rli, Ramis and Fiorini, Tommaso and Bellani, Gabriele and Talamelli, Alessandro}, title = {Experimental evaluation of the mean momentum and kinetic energy balance equations in turbulent pipe flows at high Reynolds number}, series = {Journal of Turbulence}, volume = {20}, journal = {Journal of Turbulence}, number = {5}, issn = {1468-5248}, doi = {10.1080/14685248.2019.1628968}, pages = {285 -- 299}, language = {en} } @misc{KabatOehlerStathopoulos, author = {Kabat, Nancy and Oehler, Johannes and Stathopoulos, Panagiotis}, title = {Experimental exergy analysis of a high-temperature Brayton heat pump}, series = {Proceedings of ASME Turbo Expo 2025 : Turbomachinery Technical Conference and Exposition, June 16-20, 2025, Memphis, Tennessee : Volume 4 : Controls, Diagnostics \& Instrumentation; Cycle Innovations; Education; Electric Power}, journal = {Proceedings of ASME Turbo Expo 2025 : Turbomachinery Technical Conference and Exposition, June 16-20, 2025, Memphis, Tennessee : Volume 4 : Controls, Diagnostics \& Instrumentation; Cycle Innovations; Education; Electric Power}, publisher = {American Society of Mechanical Engineers}, address = {New York, NY}, isbn = {978-0-7918-8880-3}, doi = {10.1115/GT2025-153648}, pages = {16}, abstract = {High-temperature heat pumps (HTHP) are a promising technology to provide emission free process heat at high temperatures. HTHPs available on the market can provide process heat up to 150°C. However, many industrial processes, especially in the food industry, require higher temperatures, so the industrial sector remains one of the largest emitters of greenhouse gases due to the burning of fossil fuels such as coal, natural gas and oil. To advance the decarbonization of industry towards climate neutrality and drive forward the development of HTHPs for the provision of industrial process heat, challenges such as the temperature level to be achieved while maintaining high efficiency must be addressed to ensure applicability for the end user. Despite the knowledge of the relevance of heat pumps for the decarbonization of industry, there are only a few experimental heat pumps that work with high temperature lifts at sink temperatures above 150°C. This paper shows first experimental results of a HTHP demonstrator based on the reversed Brayton cycle with air as working medium for the simultaneous provision of process heat above 150°C and process cooling below 0°C. The design of the heat pump and the experimental test procedure are explained, followed by the execution of an exergy analysis to evaluate the efficiency of the system and the components, taking into account exergy losses in order to identify optimization potential. The HTHP demonstrator called "CoBra" at the Institute of Low-Carbon Industrial Processes of the German Aerospace Center (DLR) in Cottbus consists of two radial compressors, one turbine and three shell and tube heat exchangers. One of the heat exchangers is used as a recuperator. Dry ambient air is used as the working medium in the primary and secondary cycles. The tests are performed without and with recuperation reaching heat sink temperatures of 158°C and 168°C and heat source temperatures of 11°C and -3°C. A temperature lift of 130 K and 134 K is achieved and COPs of 1.37 and 1.4, respectively. The exergy analysis indicates the compressor to be the component with the highest optimization potential with a relative irreversibility of around 50\%. The high-temperature heat exchanger has the highest exergy efficiency of all components with around 75\%. The advantages of using a recuperator are confirmed by the increase in the overall heat pump performance. The present study provides new insights into the actual behavior of a heat pump that simultaneously provides process heat above 150 °C and process cooling below 0 °C, while also demonstrating the feasibility of such a system. This work contributes to the benefits and feasibility of Brayton heat pumps for industrial applications.}, language = {en} } @inproceedings{HasanuzzamanMerboldMotuzetal., author = {Hasanuzzaman, Gazi and Merbold, Sebastian and Motuz, Vasyl and Egbers, Christoph and Cuvier, Christophe and Foucaut, Jean-Marc}, title = {Experimental investigation of active control in turbulent boundary layer using uniform blowing}, series = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, booktitle = {Proceedings of the 5th International Conference on Experimental Fluid Mechanics, Munich 2018}, editor = {K{\"a}hler, Christian J. and Hain, Rainer and Scharnowski, Sven and Fuchs, Thomas}, publisher = {Institute of Fluid Mechanics and Aerodynamics, Universit{\"a}t der Bundeswehr}, address = {Neubiberg}, isbn = {978-3-943207-32-3}, pages = {180 -- 185}, language = {en} } @incollection{GuoRiebelGellertetal., author = {Guo, Xiaoai and Riebel, Ulrich and Gellert, Marcus and Egbers, Christoph}, title = {Experimental Investigation of Multiphase Flow Structure behind a Bluff Body by LDV and TFS Technique}, language = {en} } @misc{SeeligGellertHarlander, author = {Seelig, Torsten and Gellert, Marcus and Harlander, Uwe}, title = {Experimental investigation of stratorotational instability using a thermally stratified system: instability, waves and associated momentum flux}, series = {Geophysical \& Astrophysical Fluid Dynamics}, volume = {112}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, number = {4}, issn = {0309-1929}, doi = {10.1080/03091929.2018.1488971}, pages = {239 -- 264}, language = {en} } @misc{BarzantnyHamedeMajchrzyketal., author = {Barzantny, Marcel and Hamede, Mohammed Hussein and Majchrzyk, Michał and Merbold, Sebastian and Egbers, Christoph and Kostowski, Wojciech}, title = {Experimental investigation of the flow characteristics driving the Ranque-Hilsch phenomenon}, series = {International journal of heat and mass transfer}, volume = {253}, journal = {International journal of heat and mass transfer}, publisher = {Elsevier BV}, address = {Amsterdam}, issn = {0017-9310}, doi = {10.1016/j.ijheatmasstransfer.2025.127543}, pages = {1 -- 14}, abstract = {The Ranque-Hilsch vortex tube (RHVT) is a device that separates a pressurized inlet stream into two decompressed streams of different temperature, flowing to the so-called hot and cold outlets. In this study, the flow structures within the vortex tube were examined qualitatively. The examination considered both compressible and incompressible fluids, using pressurized air and water as working fluids. A parametric study was conducted, in which the fluid inlet pressure and the vortex tube length were varied. Three tubes, with the same diameter but differing lengths (100, 180, and 240 mm) were utilized. The flow inside the tube was investigated using a flow visualization technique, which was employed in a variety of configurations and setups contingent on the specific fluid conditions under examination. The visualization process required the use of aerosol injection in the case of air, and kalliroscope particles in the case of water investigation. The research enabled the visualization of the flow structure within the vortex tube, thereby significantly advancing the comprehension of the underlying physical processes. The findings of the experimental research demonstrated the existence of phenomena of considerable scientific value. The internal vortex and its spatial and temporal structure observed in the RHVT were consistent with literature data. This was achieved despite the so-far established consensus that this type of research is challenging and not entirely reliable. In the course of water-based investigation, the cavitation phenomenon was observed in the vicinity of the internal vortex. This discovery is likely to be the first of its kind and may contribute significantly to the advancement of research on the Ranque-Hilsch phenomenon.}, language = {en} } @phdthesis{Butt, author = {Butt, Usman}, title = {Experimental investigation of the flow over macroscopic hexagonal structured surfaces}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-30555}, language = {en} } @inproceedings{MerboldEgbers, author = {Merbold, Sebastian and Egbers, Christoph}, title = {Experimental Investigation of torque scaling in turbulent Taylor-Couette flow}, language = {de} } @inproceedings{SchaeferAugensteinEschetal., author = {Sch{\"a}fer, H.-J. and Augenstein, Edgar and Esch, H. and Emunds, H.}, title = {Experimental Investigation of Transverse Jet Interaction on a Missile Body using Laser Velocimetry and Flow Visualization}, language = {en} } @phdthesis{Hasanuzzaman, author = {Hasanuzzaman, Gazi}, title = {Experimental investigation of turbulent boundary layer with uniform blowing at moderate and high Reynolds numbers}, publisher = {BTU}, address = {Cottbus-Senftenberg}, doi = {10.26127/BTUOpen-5566}, pages = {XXIII, 152}, abstract = {Experimental investigation in turbulent boundary layer flows represents one of the canonical geometries of wall bounded shear flows. Utmost relevance of such experiments, however, is applied in the engineering applications in aerospace and marine industries. In particular, continuous effort is being imparted to explore the underlying physics of the flow in order to develop models for numerical tools and to achieve flow control. Within the scope of this Ph. D. topic, application of active control method such as micro-blowing effect in the incompressible, zero pressure gradient turbulent boundary layer was investigated. Turbulent boundary layer flow is particularly interesting as well as challenging due to the presence of different interacting scales which are increasingly becoming significant as the flow inertial conditions keeps growing. Therefore, energy content of the coherent structures in outer layer becomes stronger and necessitates measurements in relatively large Reynolds number. Present control experiments in turbulent boundary layer can be split into two different work segments, where one is objected towards the data measurements in turbulent boundary layer over smooth surface with and without any external perturbation. Here, perturbation is applied in the form of wall normal blowing while keeping the magnitude of blowing very low compared to the free stream velocity. For the subsequent results reported here, magnitude of blowing ratio was varied between 0\%~6\%. In the first part of the present thesis e.g. 0.415×10e+3≤Reτ≤1.160×10e+3, measurements were performed at the Brandenburg University of Technology wind tunnel. Non-intrusive Laser Doppler Anemometry was applied to carry out a series of measurements on a zero pressure gradient flat plate turbulent boundary layer. Blowing ratio through the perforated surface was varied between 0.17\%~1.52\% of the free stream velocity. To a maximum of 50\% reduction in friction drag was achieved. For the measurements on the upper range of the stated Reynolds number, were conducted at the boundary layer wind tunnel. This boundary layer wind tunnel offers a spatially developed turbulent boundary layer over a flat plate within 2.2×10e+3≤Reτ≤5.5×10e+3 with an excellent spatial resolution. With the help of Stereo Particle Image Velocimetry technique, measurement of the velocity components were obtained covering entire boundary layer in streamwise wall normal plane. In addition, time resolved measurements were also obtained in spanwise and wall-normal plane in order to look into the morphology of turbulent structures immediately above the blowing area.}, language = {en} } @misc{HasanuzzamanMerboldCuvieretal., author = {Hasanuzzaman, Gazi and Merbold, Sebastian and Cuvier, Christophe and Motuz, Vasyl and Foucaut, Jean-Marc and Egbers, Christoph}, title = {Experimental investigation of turbulent boundary layers at high Reynolds number with uniform blowing, part I: statistics}, series = {Journal of Turbulence}, journal = {Journal of Turbulence}, number = {3}, issn = {1468-5248}, doi = {10.1080/14685248.2020.1740239}, pages = {129 -- 165}, abstract = {Uniform blowing in wall bounded shear flows is well known for its drag reducing effects and has long been investigated ever since. However, many contemporary and former research on this topic has confirmed the drag reducing effect but very less is known regarding how blowing is effecting the Reynolds stresses at high Reynolds number. Therefore, effect of uniform blowing has been experimentally investigated using Stereo Particle Image Velocimetry (SPIV) measurements in a zero pressure gradient turbulent boundary layer (TBL). The data presented in this literature covers a large range of high Reynolds number flow e.g. Reθ = 7500∼19763 where Reynolds number is based on the momentum thickness. Upstream blowing was varied from 1\%∼6\% of free stream velocity and measurements were taken downstream after a short interval. Logarithmic and outer region of the TBL was given special attention in terms of investigating statistics and turbulence properties.}, language = {en} } @misc{HamedeMerboldEgbers, author = {Hamede, Mohammed Hussein and Merbold, Sebastian and Egbers, Christoph}, title = {Experimental investigation of turbulent counter-rotating Taylor-Couette flows for radius ratio η = 0.1}, series = {Journal of Fluid Mechanics}, volume = {964}, journal = {Journal of Fluid Mechanics}, issn = {1469-7645}, doi = {10.1017/jfm.2023.392}, pages = {A36-1 -- A36-29}, language = {en} } @techreport{OenguenerEgbers, author = {{\"O}ng{\"u}ner, Emir and Egbers, Christoph}, title = {Experimental Investigation of Turbulent Pipe Flow Structures in High Reynolds Numbers}, publisher = {Lehrstuhl Aerodynamik und Str{\"o}mungslehre}, address = {Cottbus}, pages = {17 -- 18}, language = {en} } @inproceedings{HasanuzzamanMerboldMotuzetal., author = {Hasanuzzaman, Gazi and Merbold, Sebastian and Motuz, Vasyl and Egbers, Christoph}, title = {Experimental Investigation of Turbulent Structures and their Control in Boundary Layer Flow}, 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 = {Karlsruhe}, isbn = {978-3-9816764-2-6}, pages = {S. 27}, language = {en} } @phdthesis{Merbold, author = {Merbold, Sebastian}, title = {Experimental investigation on turbulent transport in Taylor-Couette flow}, edition = {1. Auflage}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7068-7}, pages = {xxviii, 173}, language = {en} } @misc{HallolYousryMerboldetal., author = {Hallol, Zeinab and Yousry, Mohamed and Merbold, Sebastian and Egbers, Christoph}, title = {Experimental investigation to study energetic structures in pipe flow at high Reynolds numbers using POD analysis}, series = {Journal of the Physical Society of Japan}, volume = {91}, journal = {Journal of the Physical Society of Japan}, number = {9}, issn = {0031-9015}, doi = {10.7566/JPSJ.91.094401}, pages = {1 -- 10}, language = {en} } @inproceedings{FroitzheimMerboldEgbers, author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph}, title = {Experimental Investigations of Taylor-Couette flow at BTU Cottbus}, series = {Book of abstracts, School Instabilities and Turbulence in Stratified Rotational Flows (ISTROF), 11-13 September, Le Havre, France, 2016}, booktitle = {Book of abstracts, School Instabilities and Turbulence in Stratified Rotational Flows (ISTROF), 11-13 September, Le Havre, France, 2016}, language = {en} } @inproceedings{MerboldEgbers, author = {Merbold, Sebastian and Egbers, Christoph}, title = {Experimental investigations on torque scaling in turbulent Taylor-Couette-Flow}, language = {en} } @misc{HamedeMerboldEgbers, author = {Hamede, Mohammed Hussein and Merbold, Sebastian and Egbers, Christoph}, title = {Experimental methods for investigating the formation of flow patterns in a very wide gap Taylor-Couette flow (\$\eta=0.1\$)}, series = {tm - Technisches Messen}, volume = {90}, journal = {tm - Technisches Messen}, number = {5}, issn = {2196-7113}, doi = {10.1515/teme-2022-0107}, pages = {332 -- 339}, language = {en} } @misc{OehlerYuecelStathopoulos, author = {Oehler, Johannes and Y{\"u}cel, Fatma Cansu and Stathopoulos, Panagiotis}, title = {Experimental performance analysis of a 50 kW Brayton turbomachine heat pump demonstrator}, series = {Proceedings of ASME Turbo Expo 2025 : Turbomachinery Technical Conference and Exposition, June 16-20, 2025, Memphis, Tennessee : Volume 4 : Controls, Diagnostics \& Instrumentation; Cycle Innovations; Education; Electric Power}, journal = {Proceedings of ASME Turbo Expo 2025 : Turbomachinery Technical Conference and Exposition, June 16-20, 2025, Memphis, Tennessee : Volume 4 : Controls, Diagnostics \& Instrumentation; Cycle Innovations; Education; Electric Power}, publisher = {American Society of Mechanical Engineers}, address = {New York, NY}, isbn = {978-0-7918-8880-3}, doi = {10.1115/GT2025-152419}, pages = {10}, abstract = {The high-temperature heat pump "CoBra" is the first demonstrator of a closed-loop Brayton heat pump realizing sink temperatures above 150 °C. The experimental results can proof the feasibility of a turbomachine-driven Brayton heat pump delivering heat and cold simultaneously. The German Aerospace Center (DLR) developed the Cottbus Brayton cycle heat pump "CoBra", a closed-loop Brayton heat pump utilizing dry air as the working medium. The CoBra is fully operational and has been used for experiments since spring 2024. This work evaluates the steady-state performance of the CoBra heat pump demonstrator experimentally for the first time. In the current setup, the heat pump achieves a heating capacity of up to 55 kW and can supply process heat up to 170°C with a coefficient of performance (COP) of 1.39 using air at TIII = 15 °C as sole heat source. The heat pump's operational envelope and performance in terms of supplied thermal power, supply temperature and efficiency is analyzed for different operating conditions. Increasing compressor speed raises both heating power and supply temperatures. Using recuperation raises both supply temperature and COP. Fluid inventory control is experimentally confirmed to be a promising control strategy for closed-loop Brayton machines. It widens the operational envelope towards part load operation at constant supply temperatures while maintaining constant efficiency. Operating points in the compressor map remain on the same operating line, thus compressor stability is not impacted by this control method.}, language = {en} } @inproceedings{RoddaBorciaHarlander, author = {Rodda, Costanza and Borcia, Ion-Dan and Harlander, Uwe}, title = {Experimental results on intertia gravity wave emission from baroclinic jets}, 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{HoffHarlanderJahangiretal., author = {Hoff, Michael and Harlander, Uwe and Jahangir, Saad and Egbers, Christoph}, title = {Experimental study of inertial waves in a spherical shell induced by librations of the inner sphere}, 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{RoddaBorciaHarlander, author = {Rodda, Costanza and Borcia, Ion-Dan and Harlander, Uwe}, title = {Experimental study of internal wave emission from baroclinic jets}, series = {11th European Fluid Mechanics Conference, Sept. 12-16, 2016, Sevilla, Spain}, booktitle = {11th European Fluid Mechanics Conference, Sept. 12-16, 2016, Sevilla, Spain}, language = {en} } @inproceedings{HoffHarlanderEgbers, author = {Hoff, Michael and Harlander, Uwe and Egbers, Christoph}, title = {Experimental study of the fluid flow in a spherical shell induced by librations of the inner sphere: linear and non-linear features}, series = {ICTW 19, Book of Abstractc, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, booktitle = {ICTW 19, Book of Abstractc, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, address = {Cottbus}, pages = {86 -- 87}, language = {en} } @inproceedings{EgbersBrucks, author = {Egbers, Christoph and Brucks, A.}, title = {Experimental study on thermal convective instabilities in the rotating wide spherical gap flow}, language = {en} } @misc{HoffHarlanderEgbers, author = {Hoff, Michael and Harlander, Uwe and Egbers, Christoph}, title = {Experimental survey of linear and nonlinear inertial waves and wave instabilities in a spherical shell}, series = {Journal of Fluid Mechanics}, journal = {Journal of Fluid Mechanics}, number = {vol. 789}, issn = {1750-6859}, doi = {10.1017/jfm.2015.743}, pages = {589 -- 616}, language = {en} } @misc{NowakMerboldEgbersetal., author = {Nowak, Torsten and Merbold, Sebastian and Egbers, Christoph and Schacht, Ralph}, title = {Experimentelle Studie mit numerischer Validierung von thermi-schen Kopplungs-Ph{\"a}nomenen mit in Flip-Chip-Technologie aufge-bauten Testchips auf Leiterplatten}, series = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, journal = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, editor = {Delgado, Antonio}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-6-4}, pages = {27.1 -- 27.8}, abstract = {In aktuellen mikro-elektronischen Systemen m{\"u}ssen verschiedene aktive und passive Bauteile auf engstem Raum miteinander auf dem Substrate (bspw. FR4-Leiterplatte) kombiniert werden. Die dabei stetig steigende Leistungsdichte bedarf einer optimierten K{\"u}hlstrategie und der Definition von konduktiven und konvektiven Entw{\"a}rmungspfade, die bereits w{\"a}hrend der Layout-Designphase der Baugruppe ber{\"u}cksichtigt werden sollten. Str{\"o}mungsmechanische Simulationen (CFD) k{\"o}nnen dabei ein erstes Abbild zur Analyse von Kopplungseffekten zwischen den W{\"a}rmequellen und der Umgebung liefern. Diese sind jedoch oft zeitaufwendig und es bedarf zumindest ein gewisses Grundverst{\"a}ndnis, um die Fluid-mechanischen Parameter, das Vernetzen der Geometrien und die gewonnenen Ergebnisse korrekt zu interpretieren. Erste analytische Ans{\"a}tze zur reduzierten Beschreibung von ungeh{\"a}usten Chips auf Leiterplattensubstrat k{\"o}nnen durch thermische Widerstandsnetzwerke abgebildet und durch Aufteilung der W{\"a}rmestr{\"o}me in Richtung Substrat (W{\"a}rmeleitung) und in Richtung des bewegten Fluides (Konvektion) n{\"a}her beschrieben werden.}, language = {de} } @phdthesis{Futterer, author = {Futterer, Birgit}, title = {Experimentelle und numerische Untersuchungen von Kugelspaltstr{\"o}mungen}, publisher = {VDI-Verl.}, address = {D{\"u}sseldorf}, isbn = {3-18-348507-9}, language = {de} } @inproceedings{OenguenerKoenigZanounetal., author = {{\"O}ng{\"u}ner, Emir and K{\"o}nig, Franziska and Zanoun, El-Sayed and Egbers, Christoph}, title = {Experimentelle Untersuchung der turbulenten Rohrstrukturen bei hohen Reynolds Zahlen}, series = {GALA - Fachtagung Lasermethoden in der Str{\"o}mungsmesstechnik, 22. Fachtagung, 9. - 11. September 2014, Karlsruhe}, booktitle = {GALA - Fachtagung Lasermethoden in der Str{\"o}mungsmesstechnik, 22. Fachtagung, 9. - 11. September 2014, Karlsruhe}, publisher = {GALA}, address = {Karlsruhe}, isbn = {978-3-9816764-0-2}, pages = {S. 24}, language = {de} } @inproceedings{HasanuzzamanMerboldEgbers, author = {Hasanuzzaman, Gazi and Merbold, Sebastian and Egbers, Christoph}, title = {Experimentelle Untersuchung von Geb{\"a}ude-integrierten Windf{\"u}hrungen mit Laser-Doppler- Anemometrie}, 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}, editor = {Czarske, J{\"u}rgen}, publisher = {GALA}, address = {Karlsruhe}, isbn = {978-3-9816764-1-9}, pages = {S. 64}, language = {de} } @inproceedings{LarcherEgbers, author = {Larcher, Thomas von and Egbers, Christoph}, title = {Experimentelle Untersuchung von Str{\"o}mungsph{\"a}nomenen freier Konvektion in einem rotierenden, von innen gek{\"u}hlten Zylinderspalt}, series = {Lasermethoden in der Str{\"o}mungsmesstechnik, 14. Fachtagung Lasermethoden in der Str{\"o}mungsmesstechnik, 5. bis 7. September 2006, Physikalisch-Technische Bundesanstalt, Braunschweig}, booktitle = {Lasermethoden in der Str{\"o}mungsmesstechnik, 14. Fachtagung Lasermethoden in der Str{\"o}mungsmesstechnik, 5. bis 7. September 2006, Physikalisch-Technische Bundesanstalt, Braunschweig}, publisher = {Physikalisch-Techn. Bundesanstalt}, address = {Braunschweig}, isbn = {3-9805613-3-X}, language = {de} } @misc{MalteseMelettideOliveiraAbideViazzoetal., author = {Maltese Meletti de Oliveira, Gabriel and Abide, St{\´e}phane and Viazzo, Stephane and Krebs, Andreas and Harlander, Uwe}, title = {Experiments and long-term high-performance computations on amplitude modulations of strato-rotational flows}, series = {Geophysical \& Astrophysical Fluid Dynamics}, volume = {115}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, number = {3}, issn = {1029-0419}, doi = {10.1080/03091929.2020.1795647}, pages = {297 -- 321}, language = {en} } @incollection{EgbersBeltrameTravnikov, author = {Egbers, Christoph and Beltrame, Philippe and Travnikov, Vadim}, title = {Experiments and numerical simulation of supercritical thermal convective motions in the spherical gap flow experiment under central force field (GEOFLOW)}, language = {en} } @phdthesis{Oenguener, author = {{\"O}ng{\"u}ner, Emir}, title = {Experiments in Pipe Flows at Transitional and Very High Reynolds Numbers}, publisher = {G{\"o}ttingen}, address = {Cuvillier Verlag}, isbn = {978-3-73699-783-7}, pages = {xxix, 128}, language = {en} } @article{LarcherBeyerEgbers, author = {Larcher, Thomas von and Beyer, Wolfgang and Egbers, Christoph}, title = {Experiments on baroclinic instabilities}, language = {en} } @inproceedings{LarcherEgbers, author = {Larcher, Thomas von and Egbers, Christoph}, title = {Experiments on baroclinic instability in a differentially heated rotating annulus}, language = {en} } @phdthesis{Xu, author = {Xu, Wenchao}, title = {Experiments on nonlinear waves in homogeneous flows with free upper surface and time-dependent forcing}, address = {Cottbus}, doi = {10.26127/BTUOpen-5386}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-53860}, pages = {148}, language = {en} } @incollection{SomosvariMeierBabcsan, author = {Somosvari, B. and Meier, M. and Babcsan, N.}, title = {Experiments on particle loaded aqueous foams}, language = {en} } @incollection{SomosvariMeier, author = {Somosvari, B. and Meier, M.}, title = {Experiments on Particles Stabilized Aqueous Foams}, language = {en} } @inproceedings{SchmidtEgbersRath, author = {Schmidt, J.-R. and Egbers, Christoph and Rath, H. J.}, title = {Experiments on the isothermal flow in wide spherical gaps}, language = {en} } @incollection{MeierHilleWallot, author = {Meier, M. and Hille, D. and Wallot, G.}, title = {Experiments on the stability of solid particle Ioaden aqueous foams}, language = {en} } @inproceedings{JongmannsMeyerMeieretal., author = {Jongmanns, Marcel and Meyer, Antoine and Meier, Martin and Kang, Changwoo and Mutabazi, Innocent and Egbers, Christoph}, title = {Experiments on thermoelectric convection in dielectric liquids in a cylindrical annulus under parabolic flight conditions}, series = {Abstract booklet for the International Conference on Rayleigh B{\´e}nard Turbulence, May 14-18, 2018, Enschede, NL}, booktitle = {Abstract booklet for the International Conference on Rayleigh B{\´e}nard Turbulence, May 14-18, 2018, Enschede, NL}, pages = {S. 20}, language = {en} } @inproceedings{MeyerJongmannsMeieretal., author = {Meyer, Antoine and Jongmanns, Marcel and Meier, Martin and Seelig, Torsten and Kang, Changwoo and Mutabazi, Innocent and Egbers, Christoph}, title = {Experiments on thermoelectric convection induced in a cylindrical annulus under microgravity conditions}, 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} } @incollection{Larcher, author = {Larcher, Thomas von}, title = {Experiments on transitions of baroclinic waves in a differentially heated rotating annulus with a free surface}, language = {en} } @inproceedings{FroitzheimMerboldEgbers, author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph}, title = {Experimentsl Investigations of Taylor-Couette flow at BTU Cottbus}, 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} } @misc{VinczeHancockHarlanderetal., author = {Vincze, Miklos and Hancock, Cathrine and Harlander, Uwe and Rodda, Costanza and Speer, Kevin}, title = {Extreme temperature fluctuations in laboratory models of the mid-latitude atmospheric circulation}, series = {Scientific reports}, volume = {13 (2023)}, journal = {Scientific reports}, doi = {10.1038/s41598-023-47724-2}, pages = {13}, language = {en} } @misc{FuttererYoshikawaMutabazietal., author = {Futterer, Birgit and Yoshikawa, Harunori and Mutabazi, Innocent and Egbers, Christoph}, title = {Facilities to alter weight - Electric Fields}, series = {Generation and Applications of Extra-Terrestrial Environments on Earth}, journal = {Generation and Applications of Extra-Terrestrial Environments on Earth}, editor = {Beysens, Daniel and Loon, Jacobus van}, publisher = {River Publ.}, address = {Aalborg}, isbn = {978-87-93237-53-7}, pages = {91 -- 100}, language = {en} } @misc{FuttererEgbersKochetal., author = {Futterer, Birgit and Egbers, Christoph and Koch, Sandy and Dahley, Norman and Jehring, Lothar}, title = {First identication of sub-and supercritical convection patterns from GeoFlow, the geophysical flow simulation experiment integrated in Fluid Science Laboratory}, language = {en} } @inproceedings{Egbers, author = {Egbers, Christoph}, title = {First results from large pipe test facility at BTU Cottbus}, language = {en} } @misc{HasanuzzamanEgbers, author = {Hasanuzzaman, Gazi and Egbers, Christoph}, title = {Flow control of a turbulent boundary layer using uniform blowing}, series = {Progress in Turbulence X : Proceedings of the iTi Conference on Turbulence 2023}, journal = {Progress in Turbulence X : Proceedings of the iTi Conference on Turbulence 2023}, isbn = {978-3-031-55924-2}, doi = {10.1007/978-3-031-55924-2_36}, language = {en} } @phdthesis{Jongmanns, author = {Jongmanns, Marcel}, title = {Flow control of thermal convection using thermo electro hydrodynamic forces in a cylindrical annulus}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7044-1}, pages = {x, 160}, language = {en} } @incollection{ZanounDurstEgbers, author = {Zanoun, El-Sayed and Durst, F. and Egbers, Christoph}, title = {Flow Developments in Smooth Wall Circular Duct Facility}, language = {en} } @inproceedings{FroitzheimMerboldEgbers, author = {Froitzheim, Andreas and Merbold, Sebastian and Egbers, Christoph}, title = {Flow organization in the region of the torque maximum in a wide gap Tayor-Couette experiment}, 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. 362}, language = {en} } @incollection{MerboldFroitzheimEgbers, author = {Merbold, Sebastian and Froitzheim, Andreas and Egbers, Christoph}, title = {Flow Pattern and angular motion transport in a wide gap Taylor-Couette flow}, series = {Str{\"o}mungstechnische Tagung 2014, Tagung anl{\"a}sslich des 100. Geburtstags von Werner Albring}, booktitle = {Str{\"o}mungstechnische Tagung 2014, Tagung anl{\"a}sslich des 100. Geburtstags von Werner Albring}, editor = {Fr{\"o}hlich, Jochen and Odenbach, Stefan and Vogeler, Konrad}, publisher = {TUDpress Verlag der Wissenschaften}, address = {Dresden}, isbn = {978-3-944331-78-2}, language = {en} } @misc{MeierJongmannsMeyeretal., author = {Meier, Martin and Jongmanns, Marcel and Meyer, Antoine and Seelig, Torsten and Egbers, Christoph and Mutabazi, Innocent}, title = {Flow Pattern and Heat Transfer in a Cylindrical Annulus Under 1 g and Low-g Conditions: Experiments}, series = {Microgravity science and technology : international journal for microgravity research and applications}, volume = {30}, journal = {Microgravity science and technology : international journal for microgravity research and applications}, number = {5}, issn = {1875-0494}, doi = {10.1007/s12217-018-9649-y}, pages = {699 -- 712}, language = {en} } @inproceedings{MeierJongmannsRuoffetal., author = {Meier, Martin and Jongmanns, Marcel and Ruoff, Vilko and Egbers, Christoph and Meyer, Antoine and Mutabazi, Innocent}, title = {Flow pattern and heat transfer in a cylindrical annulus under 1g and low-g conditions: Experiments}, series = {Joint Conference ISPS-7 and ELGRA-25 October, 2-6 2017, Juan-les-Pins, France, Abstract book}, booktitle = {Joint Conference ISPS-7 and ELGRA-25 October, 2-6 2017, Juan-les-Pins, France, Abstract book}, pages = {S. 48}, language = {en} } @inproceedings{MeyerCrumeyrolleMutabazietal., author = {Meyer, Antoine and Crumeyrolle, Olivier and Mutabazi, Innocent and Meier, Martin and Jongmanns, Marcel and Ruoff, Vilko and Seelig, Torsten and Egbers, Christoph}, title = {Flow pattern and heat transfer in a cylindrical annulus under 1g and low-g conditions: theory and simulation}, series = {Joint Conference ISPS-7 and ELGRA-25 October, 2-6 2017, Juan-les-Pins, France, Abstract book}, booktitle = {Joint Conference ISPS-7 and ELGRA-25 October, 2-6 2017, Juan-les-Pins, France, Abstract book}, pages = {S. 48}, language = {en} } @misc{MeyerCrumeyrolleMutabazietal., author = {Meyer, Antoine and Crumeyrolle, Olivier and Mutabazi, Innocent and Meier, Martin and Jongmanns, Marcel and Renoult, Marie-Charlotte and Seelig, Torsten and Egbers, Christoph}, title = {Flow Patterns and Heat Transfer in a Cylindrical Annulus under 1g and low-g Conditions: Theory and Simulation}, series = {Microgravity Science and Technology}, volume = {30}, journal = {Microgravity Science and Technology}, number = {5}, issn = {0938-0108}, doi = {10.1007/s12217-018-9636-3}, pages = {653 -- 662}, language = {en} } @misc{MerboldHamedeFroitzheimetal., author = {Merbold, Sebastian and Hamede, Mohammed Hussein and Froitzheim, Andreas and Egbers, Christoph}, title = {Flow regimes in a very wide-gap Taylo-Couette flow with counter rotating cylinders}, series = {Philosophical transactions of the Royal Society : Series A, Mathematical, physical and engineering sciences}, volume = {381}, journal = {Philosophical transactions of the Royal Society : Series A, Mathematical, physical and engineering sciences}, number = {2246}, issn = {1364-503X}, doi = {10.1098/rsta.2022.0113}, language = {en} } @article{Smieszek, author = {Smieszek, Marlene}, title = {Flow structures and stability in Newtonian and non-Newtonian Taylor-Couette flow}, language = {en} } @inproceedings{IwatsuEgbers, author = {Iwatsu, R. and Egbers, Christoph}, title = {Flows in a cylinder with top free surface driven by the bottom wall rotation}, language = {en} } @incollection{HamedeMerboldEgbers, author = {Hamede, Mohammed Hussein and Merbold, Sebastian and Egbers, Christoph}, title = {Formation of flow patterns in a counter-rotating very wide gap Taylor-Couette flow (η = 0.1)}, series = {Experimentelle Str{\"o}mungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau}, booktitle = {Experimentelle Str{\"o}mungsmechanik : 29. Fachtagung, 6.-8. September 2022, Ilmenau}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-8-8}, pages = {8}, language = {en} } @inproceedings{FroitzheimEzetaMerboldetal., author = {Froitzheim, Andreas and Ezeta, Rodrigo and Merbold, Sebastian and Egbers, Christoph and Lohse, D. and Sun, C.}, title = {Formation of large scale vortices in the torque maximum region in Taylor-Couette flow}, series = {25. GALA - Fachtagung Experimentelle Str{\"o}mungsmechanik, 5.-7. September 2017, Karlsruhe-Ettlingen}, booktitle = {25. GALA - Fachtagung Experimentelle Str{\"o}mungsmechanik, 5.-7. September 2017, Karlsruhe-Ettlingen}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-3-3}, pages = {55 -- 58}, language = {en} } @incollection{JehringZanounEgbers, author = {Jehring, Lothar and Zanoun, El-Sayed and Egbers, Christoph}, title = {Fortschritte bei der Entwicklung und Anwendung eines miniaturisierten Sensors f{\"u}r wandnahe Str{\"o}mungen}, language = {de} } @misc{FuttererDahleyKochetal., author = {Futterer, Birgit and Dahley, Norman and Koch, Sandy and Scurtu, Nicoleta and Egbers, Christoph}, title = {From isoviscous convective experiment 'GeoFlow I' to temperature-dependent viscosity in 'GeoFlow II' Fluid physics experiments on-board ISS for the capture of convection phenomena in Earth's outer core and mantle}, language = {en} } @inproceedings{FuttererDahleyKochetal., author = {Futterer, Birgit and Dahley, Norman and Koch, Sandy and Scurtu, Nicoleta and Egbers, Christoph and Chossat, P. and Hollerbach, Rainer and Beltrame, Philippe and Breuer, Doris and Feudel, F. and Mutabazi, Innocent and Tuckerman, L. S.}, title = {From isoviscous to temperature-dependent viscous flow within the fluid physics ISS COLUMBUS laboratory experiment GeoFlow}, language = {en} } @inproceedings{LarcherFuttererEgbersetal., author = {Larcher, Thomas von and Futterer, Birgit and Egbers, Christoph and Hollerbach, Rainer and Chossat, P.}, title = {Geoflow - European Microgravity Experiments on Thermal Convection in Rotating Spherical Shells under influence of Central Force Field}, language = {en} } @article{LarcherFuttererEgbersetal., author = {Larcher, Thomas von and Futterer, Birgit and Egbers, Christoph and Hollerbach, Rainer and Chossat, P.}, title = {Geoflow - European Microgravity Experiments on Thermal Convection in Rotating Spherical Shells under influence of Central Force Field}, language = {en} } @misc{TravnikovEgbersHollerbach, author = {Travnikov, Vadim and Egbers, Christoph and Hollerbach, Rainer}, title = {GEOFLOW-experiment on ISS (part 2) : numerical simulation}, series = {Advances in Space Research}, volume = {32}, journal = {Advances in Space Research}, number = {2}, issn = {0273-1177}, doi = {10.1016/S0273-1177(03)90249-3}, pages = {181 -- 189}, language = {en} } @misc{BeltrameHollerbachEgbers, author = {Beltrame, Philippe and Hollerbach, Rainer and Egbers, Christoph}, title = {GEOFLOW-experiment on ISS (part 3): Bifurcation analysis}, volume = {32}, number = {2}, issn = {0273-1177}, doi = {10.1016/S0273-1177(03)90250-X}, pages = {191 -- 197}, language = {en} } @inproceedings{FuttererHollerbachEgbers, author = {Futterer, Birgit and Hollerbach, Rainer and Egbers, Christoph}, title = {GeoFlow: 3D numerical simulation of supercritical thermal convective states}, language = {en} } @article{FuttererHollerbachEgbers, author = {Futterer, Birgit and Hollerbach, Rainer and Egbers, Christoph}, title = {GeoFlow: 3D numerical simulation of supercritical thermal convective states}, language = {en} } @article{LarcherFuttererEgbers, author = {Larcher, Thomas von and Futterer, Birgit and Egbers, Christoph}, title = {GeoFlow: On the status of experimental preparation of spherical gap flow experiments with central force field on International Space Station (ISS)}, language = {en} } @article{BeltrameTravnikovGellertetal., author = {Beltrame, Philippe and Travnikov, Vadim and Gellert, Marcus and Egbers, Christoph}, title = {GEOFLOW: Simulation of convection in a spherical gap under central force field}, language = {en} } @phdthesis{Motuz, author = {Motuz, Vasyl}, title = {Gleichm{\"a}ßiges Mikro-Ausblasen zur Beeinflussung einer turbulenten Grenzschicht}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-31242}, pages = {137}, language = {de} } @phdthesis{Rodda, author = {Rodda, Costanza}, title = {Gravity wave emission from jet systems in the differentially heated rotating annulus experiment}, edition = {1. Auflage}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7110-3}, pages = {xvi, 180}, language = {en} } @incollection{BeltrameEgbersTravnikov, author = {Beltrame, Philippe and Egbers, Christoph and Travnikov, Vadim}, title = {Heteroclinic cycles in the geoflowexperiment on the International Space Station}, isbn = {84-95999-28-5}, language = {en} }