@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{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} } @inproceedings{Futterer, author = {Futterer, Birgit}, title = {3D-FG-Widerstandsmodellierung: Analyse von Diskretisierungsfehlern bei gitterunabh{\"a}ngiger Elektrodenpositionierung}, series = {19. Kolloquium Elektromagnetische Tiefenforschung, Burg Ludwigstein, 1.10.-5.10.2001}, booktitle = {19. Kolloquium Elektromagnetische Tiefenforschung, Burg Ludwigstein, 1.10.-5.10.2001}, publisher = {Dt. Geophysikalische Ges.}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:b103-emtf197}, pages = {111 -- 119}, language = {de} } @inproceedings{LarcherHarlanderEgbers, author = {Larcher, Thomas von and Harlander, Uwe and Egbers, Christoph}, title = {Multivariate statistical data analysis methods for detecting baroclinic wave interactions in the thermally driven rotating annulus}, 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{SeeligHarlanderFaulwetteretal., author = {Seelig, Torsten and Harlander, Uwe and Faulwetter, Robin and Egbers, Christoph}, title = {Irregular and singular vector growth in the differentially heated rotating annulus}, language = {en} } @inproceedings{SeeligHarlanderFaulwetteretal., author = {Seelig, Torsten and Harlander, Uwe and Faulwetter, Robin and Egbers, Christoph}, title = {Irregular and singular vector growth in the differentially heated rotating annulus}, language = {en} } @inproceedings{Borcia, author = {Borcia, Ion-Dan}, title = {Attractors, eigenvalues and mean flow interactions in a fluid confined between two co-rotating cylinders}, language = {en} } @inproceedings{CrumeyrolleSmieszekMutabazietal., author = {Crumeyrolle, Olivier and Smieszek, Marlene and Mutabazi, Innocent and Egbers, Christoph}, title = {Dielectrophoretic instabilities in annular configurations}, language = {en} } @inproceedings{Harlander, author = {Harlander, Uwe}, title = {The differentially heated annulus as a laboratory analog of baroclinic instability and the atmospheric circulation}, language = {en} } @inproceedings{HarlanderMaas, author = {Harlander, Uwe and Maas, L. R. M.}, title = {Tide-topography interactions?}, language = {en} } @inproceedings{HarlanderAlexandrovWangetal., author = {Harlander, Uwe and Alexandrov, Kiril and Wang, Yongtai and Seelig, Torsten and Egbers, Christoph}, title = {The differentially heated rotating annulus as a laboratory analog of baroclinic instability and the atmospheric circulation}, language = {en} } @inproceedings{Egbers, author = {Egbers, Christoph}, title = {First results from large pipe test facility at BTU Cottbus}, 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} } @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{Herzog, author = {Herzog, Nicoleta}, title = {Viscoelastic fluid instability in analogy with the magnetorotational instability in Taylor-Couette flows}, language = {en} } @inproceedings{MerboldEgbers, author = {Merbold, Sebastian and Egbers, Christoph}, title = {Experimental Investigation of torque scaling in turbulent Taylor-Couette flow}, language = {de} } @inproceedings{MerboldEgbers, author = {Merbold, Sebastian and Egbers, Christoph}, title = {Drehmomentuntersuchungen im differentiell rotierenden Taylor-Couette System}, language = {de} } @misc{ZanounEgbersDewidar, author = {Zanoun, El-Sayed and Egbers, Christoph and Dewidar, Yasser}, title = {Two-Point Velocity Correlations in Fully Developed Turbulent Pipe Flow at Shear Reynolds Number of Reτ ≈ 4000}, series = {Proceedings in Applied Mathematics and Mechanics : (PAMM)}, volume = {20}, journal = {Proceedings in Applied Mathematics and Mechanics : (PAMM)}, number = {1}, issn = {1617-7061}, doi = {10.1002/pamm.202000330}, pages = {4}, language = {en} } @incollection{TravnikovEgbersHollerbach, author = {Travnikov, Vadim and Egbers, Christoph and Hollerbach, Rainer}, title = {Thermische Konvektion im Kugelspalt unter radialem Kraftfeld: Dreidimensionale St{\"o}mung}, language = {de} } @misc{YoshikawaKangMutabazietal., author = {Yoshikawa, Harunori and Kang, Changwoo and Mutabazi, Innocent and Zaussinger, Florian and Haun, Peter and Egbers, Christoph}, title = {Thermoelectrohydrodynamic convection in parallel plate capacitors under dielectric heating conditions}, series = {Physical review fluids}, volume = {5}, journal = {Physical review fluids}, number = {11}, issn = {2469-990X}, doi = {10.1103/PhysRevFluids.5.113503}, pages = {17}, language = {en} } @misc{HasanuzzamanMerboldCuvieretal., author = {Hasanuzzaman, Gazi and Merbold, Sebastian and Cuvier, Christophe and Motuz, Vasyl and Foucaut, Jean-Marc and Egbers, Christoph}, title = {Experimental investigation of turbulent boundary layers at high Reynolds number with uniform blowing, part I: statistics}, series = {Journal of Turbulence}, journal = {Journal of Turbulence}, number = {3}, issn = {1468-5248}, doi = {10.1080/14685248.2020.1740239}, pages = {129 -- 165}, abstract = {Uniform blowing in wall bounded shear flows is well known for its drag reducing effects and has long been investigated ever since. However, many contemporary and former research on this topic has confirmed the drag reducing effect but very less is known regarding how blowing is effecting the Reynolds stresses at high Reynolds number. Therefore, effect of uniform blowing has been experimentally investigated using Stereo Particle Image Velocimetry (SPIV) measurements in a zero pressure gradient turbulent boundary layer (TBL). The data presented in this literature covers a large range of high Reynolds number flow e.g. Reθ = 7500∼19763 where Reynolds number is based on the momentum thickness. Upstream blowing was varied from 1\%∼6\% of free stream velocity and measurements were taken downstream after a short interval. Logarithmic and outer region of the TBL was given special attention in terms of investigating statistics and turbulence properties.}, language = {en} } @misc{XuHarlander, author = {Xu, Wenchao and Harlander, Uwe}, title = {Inertial mode interactions in a rotating tilted cylindrical annulus with free surface}, series = {Physical Review Fluids}, volume = {5}, journal = {Physical Review Fluids}, number = {9}, issn = {2469-990X}, doi = {10.1103/PhysRevFluids.5.094801}, pages = {21}, language = {en} } @misc{ZaussingerHaunSzaboetal., author = {Zaussinger, Florian and Haun, Peter and Szabo, Peter and Travnikov, Vadim and Al-Kawwas, Mustafa and Egbers, Christoph}, title = {Rotating spherical gap convection in the GeoFlow International Space Station (ISS) experiment}, series = {Physical Review Fluids}, volume = {5}, journal = {Physical Review Fluids}, number = {6}, issn = {2469-990X}, doi = {10.1103/PhysRevFluids.5.063502}, pages = {23}, language = {en} } @misc{TravnikovZaussingerHaunetal., author = {Travnikov, Vadim and Zaussinger, Florian and Haun, Peter and Egbers, Christoph}, title = {Influence of dielectrical heating on convective flow in a radial force field}, series = {Physical Review E}, volume = {101}, journal = {Physical Review E}, number = {5}, issn = {2470-0053}, doi = {10.1103/PhysRevE.101.053106}, pages = {16}, language = {en} } @misc{RoddaHarlander, author = {Rodda, Costanza and Harlander, Uwe}, title = {Transition from Geostrophic Flows to Inertia-Gravity Waves in the Spectrum of a Differentially Heated Rotating Annulus Experiment}, series = {Journal of the Atmospheric Sciences}, volume = {77}, journal = {Journal of the Atmospheric Sciences}, number = {8}, issn = {1520-0469}, doi = {10.1175/JAS-D-20-0033.1}, pages = {2793 -- 2806}, language = {en} } @misc{GhasemiKleinHarlanderetal., author = {Ghasemi, Abouzar and Klein, Marten and Harlander, Uwe and Kurgansky, Michael V. and Schaller, Eberhard and Will, Andreas}, title = {Mean flow generation by G{\"o}rtler vortices in a rotating annulus with librating side walls}, series = {Physics of Fluids}, volume = {28}, journal = {Physics of Fluids}, number = {056603}, doi = {10.1063/1.4948406}, pages = {1 -- 23}, abstract = {Time periodic variation of the rotation rate of an annulus induces in supercritical regime an unstable Stokes boundary layer over the cylinder side walls, generating G{\"o}rtler vortices in a portion of a libration cycle as a discrete event. Numerical results show that these vortices propagate into the fluid bulk and generate an azimuthal mean flow. Direct numerical simulations of the fluid flow in an annular container with librating outer (inner) cylinder side wall and Reynolds-averaged Navier-Stokes (RANS) equations as diagnostic equations are used to investigate generation mechanism of the retrograde (prograde) azimuthal mean flow in the bulk. First, we explain, phenomenologically, how absolute angular momentum of the bulk flow is mixed and changed due to the propagation of the G{\"o}rtler vortices, causing a new vortex of basin size. Then we investigate the RANS equations for intermediate time scale of the development of the G{\"o}rtler vortices and for long time scale of the order of several libration periods. The former exhibits sign selection of the azimuthal mean flow. Investigating the latter, we predict that the azimuthal mean flow is proportional to the libration amplitude squared and to the inverse square root of the Ekman number and libration frequency and then confirms this using the numerical data. Additionally, presence of an upscale cascade of energy is shown, using the kinetic energy budget of fluctuating flow.}, language = {en} } @misc{FuttererDahleyEgbers, author = {Futterer, Birgit and Dahley, Norman and Egbers, Christoph}, title = {Thermal electro-hydrodynamic heat transfer augmentation in vertical annuli by the use of dielectrophoretic forces through a.c. electric field}, series = {International Journal of Heat and Mass Transfer}, volume = {93}, journal = {International Journal of Heat and Mass Transfer}, issn = {0017-9310}, pages = {144 -- 154}, 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} } @misc{FuttererDahleyEgbers, author = {Futterer, Birgit and Dahley, Norman and Egbers, Christoph}, title = {Thermal electro-hydrodynamic heat transfer augmentation in vertical annuli by the use of dielectrophoretic forces through a.c. electric field}, series = {International Journal of Heat and Mass Transfer}, volume = {vol. 93}, journal = {International Journal of Heat and Mass Transfer}, doi = {doi:10.1016/j.ijheatmasstransfer.2015.10.005}, pages = {144 -- 154}, language = {en} } @misc{VinczeHarlanderLarcheretal., author = {Vincze, Miklos and Harlander, Uwe and Larcher, Thomas von and Egbers, Christoph}, title = {An experimental study of regime transitions in a differentially heated baroclinic annulus with flat and sloping bottom topographies}, series = {Nonlinear Processes in Geophysics}, volume = {21}, journal = {Nonlinear Processes in Geophysics}, number = {1}, issn = {1607-7946}, doi = {10.5194/npg-21-237-2014}, pages = {237 -- 250}, language = {en} } @misc{KleinSeeligKurganskyetal., author = {Klein, Marten and Seelig, Torsten and Kurgansky, Michael V. and Ghasemi, Abouzar and Borcia, Ion-Dan and Will, Andreas and Schaller, Eberhard and Egbers, Christoph and Harlander, Uwe}, title = {Inertial wave excitation and focusing in a liquid bounded by a frustum and a cylinder}, series = {Journal of Fluid Mechanics}, journal = {Journal of Fluid Mechanics}, number = {vol. 751}, issn = {1750-6859}, doi = {10.1017/jfm.2014.304}, pages = {255 -- 297}, abstract = {The mechanism of localized inertial wave excitation and its efficiency is investigated for an annular cavity rotating with Ω0 . Meridional symmetry is broken by replacing the inner cylinder with a truncated cone (frustum). Waves are excited by individual longitudinal libration of the walls. The geometry is non-separable and exhibits wave focusing and wave attractors. We investigated laboratory and numerical results for the Ekman number E ≈ 10-6. inclination α = 5.71◦ and libration amplitudes ε 0.2 within the inertial wave band 0 < ω < 2Ω0 . Under the assumption that the inertial waves do not essentially affect the boundary-layer structure, we use classical boundary-layer analysis to study oscillating Ekman layers over a librating wall that is at an angle α = 0 to the axis of rotation. The Ekman layer erupts at frequency ω = f∗, where f∗ ≡ 2Ω0 sin α is the effective Coriolis parameter in a plane tangential to the wall. For the selected inclination this eruption occurs for the forcing frequency ω/Ω0 = 0.2. For the librating lids eruption occurs at ω/Ω0 = 2. The study reveals that the frequency dependence of the total kinetic energy Kω of the excited wave field is strongly connected to the square of the Ekman pumping velocity wE (ω) that, in the linear limit, becomes singular when the boundary layer erupts. This explains the frequency dependence of non-resonantly excited waves. By the localization of the forcing, the two configurations investigated, (i) frustum libration and (ii) lids together with outer cylinder in libration, can be clearly distinguished by their response spectra. Good agreement was found for the spatial structure of low-order wave attractors and periodic orbits (both characterized by a small number of reflections) in the frequency windows predicted by geometric ray tracing. For 'resonant' frequencies a significantly increased total bulk energy was found, while the energy in the boundary layer remained nearly constant. Inertial wave energy enters the bulk flow via corner beams, which are parallel to the characteristics of the underlying Poincar{\´e} problem. Numerical simulations revealed a mismatch between the wall-parallel mass fluxes near the corners. This leads to boundary-layer eruption and the generation of inertial waves in the corners.}, language = {en} } @misc{SeeligHarlander, author = {Seelig, Torsten and Harlander, Uwe}, title = {Can zonally symmetric inertial waves drive an oscillating zonal mean flow?}, series = {Geophysical \& Astrophysical Fluid Dynamics}, volume = {109}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, number = {6}, issn = {1029-0419}, doi = {10.1080/03091929.2015.1094064}, pages = {541 -- 566}, 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} } @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{KoenigZanounOengueneretal., author = {K{\"o}nig, Franziska and Zanoun, El-Sayed and {\"O}ng{\"u}ner, Emir and Egbers, Christoph}, title = {The CoLaPipe - The new Cottbus large pipe test facility at Brandenburg University of Technology Cottbus-Senftenberg}, series = {Review of scientific instruments}, volume = {85}, journal = {Review of scientific instruments}, number = {7}, issn = {1089-7623}, doi = {10.1063/1.4884717}, pages = {075115-1 -- 075115-9}, 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} } @misc{ButtJehringEgbers, author = {Butt, Usman and Jehring, Lothar and Egbers, Christoph}, title = {Mechanism of drag reduction for circular cylinders with patterned surface}, series = {International journal of heat and fluid flow}, volume = {Vol. 45}, journal = {International journal of heat and fluid flow}, issn = {1879-2278}, pages = {128 -- 134}, language = {en} } @misc{FuttererEgbers, author = {Futterer, Birgit and Egbers, Christoph}, title = {Der innere Kreislauf der Erde : geophysikalisches Str{\"o}mungsexperiment auf der ISS}, series = {Physik in unserer Zeit}, volume = {45}, journal = {Physik in unserer Zeit}, number = {3}, isbn = {1521-3943}, pages = {126 -- 131}, language = {de} } @phdthesis{Dahley, author = {Dahley, Norman}, title = {Dielectrophoretic flow control of thermal convection in cylindrical geometries}, publisher = {Cuvillier}, address = {G{\"o}ttingen}, isbn = {978-3-95404-863-2}, pages = {IX, 171}, language = {en} } @phdthesis{Seelig, author = {Seelig, Torsten}, title = {Inertial wave propagation, focusing and mean flow excitation : theory and experiments}, publisher = {Cuvillier}, address = {G{\"o}ttingen}, isbn = {978-3-95404-793-2}, pages = {XIII, 113}, 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{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{RoddaHarlanderSavaroetal., author = {Rodda, Costanza and Harlander, Uwe and Savaro, C. and Campagne, A. and Calpe Linares, M. and Augier, P. and Sommeria, Joel and Valran, T. and Viboud, Samuel and Mordant, N.}, title = {Can Laboratory experiments help to explain the atmosphere and ocean's energetics?}, series = {Colaborative Research Center TRR 181, Energy transfers in Atmosphere and Oceans, 16th - 18th Mar. 2021, Universit{\"a}t Hamburg, Center for Earth System Research and Sustainability (CEN)}, journal = {Colaborative Research Center TRR 181, Energy transfers in Atmosphere and Oceans, 16th - 18th Mar. 2021, Universit{\"a}t Hamburg, Center for Earth System Research and Sustainability (CEN)}, language = {en} } @phdthesis{MalteseMelettideOliveira, author = {Maltese Meletti de Oliveira, Gabriel}, title = {High-performance computing and laboratory experiments on strato-rotational instabilities}, address = {Cottbus}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-54408}, pages = {155}, language = {en} } @misc{TravnikovEgbers, author = {Travnikov, Vadim and Egbers, Christoph}, title = {Linear stability analysis of the convective flow in a spherical gap with rotating inner surface}, series = {International Journal of Heat and Mass Transfer}, volume = {148}, journal = {International Journal of Heat and Mass Transfer}, issn = {0017-9310}, doi = {10.1016/j.ijheatmasstransfer.2019.119052}, pages = {10}, language = {en} } @misc{HallolYousryMerboldetal., author = {Hallol, Zeinab and Yousry, Mohamed and Merbold, Sebastian and Egbers, Christoph}, title = {Time-resolved PIV measurements in fully developed turbulent pipe flow}, series = {25th International Congress of Theoretical and Applied Mechanics Milan (Italy), 22-27 August 2021}, journal = {25th International Congress of Theoretical and Applied Mechanics Milan (Italy), 22-27 August 2021}, isbn = {978-83-65550-31-6}, pages = {1374 -- 1375}, language = {en} } @misc{SzaboZaussingerHaunetal., author = {Szabo, Peter and Zaussinger, Florian and Haun, Peter and Travnikov, Vadim and Meier, Martin and Egbers, Christoph}, title = {Complementary numerical and experimental study in the baroclinic annulus for the microgravity experiment AtmoFlow}, series = {EGU General Assembly 2020, EGU2020-20956, Online | 4-8 May 2020}, journal = {EGU General Assembly 2020, EGU2020-20956, Online | 4-8 May 2020}, doi = {10.5194/egusphere-egu2020-20956}, pages = {2}, language = {en} } @misc{ZaussingerCanfieldFroitzheimetal., author = {Zaussinger, Florian and Canfield, Peter and Froitzheim, Andreas and Travnikov, Vadim and Haun, Peter and Meier, Martin and Meyer, Antoine and Heintzmann, Pascal and Driebe, Thomas and Egbers, Christoph}, title = {AtmoFlow - Investigation of Atmospheric-Like Fluid Flows Under Microgravity Conditions}, series = {Microgravity Science and Technology : An International Journal for Microgravity and Space Exploration Related Research}, journal = {Microgravity Science and Technology : An International Journal for Microgravity and Space Exploration Related Research}, publisher = {Springer}, issn = {0938-0108}, doi = {10.1007/s12217-019-09717-7}, pages = {1 -- 19}, language = {en} } @misc{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{SesterhennShahirpour, author = {Sesterhenn, J{\"o}rn and Shahirpour, Amir}, title = {A characteristic dynamic mode decomposition}, series = {Theoretical and computational fluid dynamics}, volume = {33}, journal = {Theoretical and computational fluid dynamics}, number = {3-4}, issn = {1432-2250}, doi = {10.1007/s00162-019-00494-y}, pages = {281 -- 305}, language = {en} } @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} } @misc{MeyerSeeligGerstneretal., author = {Meyer, Antoine and Seelig, Torsten and Gerstner, Philipp and Kang, Changwoo and Meier, Martin and Jongmanns, Marcel and Baumann, Martin and Mutabazi, Innocent and Heuveline, Vincent and Egbers, Christoph}, title = {Thermo-electro-hydrodynamic instability of a dielectric fluid in a vertical cylindrical annulus: Earth's gravity and weightless conditions}, series = {LIA-ISTROF workshop 2019 Instabilities and Turbulence in Stratified Rotational Flows Cottbus, 19th-20th June 2019 Brandenburg}, journal = {LIA-ISTROF workshop 2019 Instabilities and Turbulence in Stratified Rotational Flows Cottbus, 19th-20th June 2019 Brandenburg}, address = {Cottbus}, pages = {1}, language = {en} } @phdthesis{Jongmanns, author = {Jongmanns, Marcel}, title = {Flow control of thermal convection using thermo electro hydrodynamic forces in a cylindrical annulus}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7044-1}, pages = {x, 160}, language = {en} } @misc{MeyerSeeligMeieretal., author = {Meyer, Antoine and Seelig, Torsten and Meier, Martin and Mutabazi, Innocent and Egbers, Christoph}, title = {Thermo-electro-hydrodynamic instability of a dielectric fluid in a vertical cylindrical annulus: Earth's gravity and weightless conditions}, series = {26th European Low Gravity Research Association Biennial Symposium and General Assembly, Granada (Spanien), September 24-27, 2019}, journal = {26th European Low Gravity Research Association Biennial Symposium and General Assembly, Granada (Spanien), September 24-27, 2019}, pages = {115 -- 116}, language = {en} } @misc{MeierMeyerMutabazietal., author = {Meier, Martin and Meyer, Antoine and Mutabazi, Innocent and Egbers, Christoph}, title = {Microgravity experiments on thermo-electric flows}, series = {26th European Low Gravity Research Association Biennial Symposium and General Assembly, Granada (Spanien), September 24-27, 2019}, journal = {26th European Low Gravity Research Association Biennial Symposium and General Assembly, Granada (Spanien), September 24-27, 2019}, pages = {293 -- 294}, language = {en} } @misc{MeyerSeeligGerstneretal., author = {Meyer, Antoine and Seelig, Torsten and Gerstner, Philipp and Kang, Changwoo and Meier, Martin and Jongmanns, Marcel and Baumann, Martin and Mutabazi, Innocent and Heuveline, Vincent and Egbers, Christoph}, title = {Thermoelectric instability in a vertical cylindrical annulus}, series = {8th International Symposium on Bifurcations and Instabilities in Fluid Dynamics (BIFD), 16-19 July, 2019, University of Limerick, Ireland}, journal = {8th International Symposium on Bifurcations and Instabilities in Fluid Dynamics (BIFD), 16-19 July, 2019, University of Limerick, Ireland}, address = {Limerick}, pages = {1}, language = {en} } @incollection{YousryMerboldEgbers, author = {Yousry, Mohamed and Merbold, Sebastian and Egbers, Christoph}, title = {Influence of convex structured surfaces on turbulent channel flow at different channel heights}, series = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, booktitle = {Experimentelle Str{\"o}mungsmechanik : 27. Fachtagung 3.-5. September 2019 Erlangen}, editor = {Delgado, Antonio}, publisher = {Deutsche Gesellschaft f{\"u}r Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.}, address = {Karlsruhe}, isbn = {978-3-9816764-6-4}, pages = {5.1 -- 5.9}, language = {en} } @misc{HarlanderLeGalBorciaetal., author = {Harlander, Uwe and Le Gal, Patrice and Borcia, Ion-Dan and Le Diz{\`e}s, St{\´e}phane and Chen, Jun and Favier, Benjamin}, title = {The linear instability of the stratified plane Poiseuille flow}, series = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, journal = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, address = {Turin}, pages = {1}, language = {en} } @misc{XuHarlander, author = {Xu, Wenchao and Harlander, Uwe}, title = {Mean flow generation in rotating annulus with stochastic methods}, series = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, journal = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, address = {Turin}, pages = {1}, language = {en} } @misc{FroitzheimMerboldOstillaMonicoetal., author = {Froitzheim, Andreas and Merbold, Sebastian and Ostilla-M{\´o}nico, Rodolfo and Egbers, Christoph}, title = {Angular momentum transport and flow organization in Taylor-Couette flow at radius ratio of η=0.357"}, series = {Physical Review Fluids}, volume = {4}, journal = {Physical Review Fluids}, doi = {10.1103/PhysRevFluids.4.084605}, pages = {20}, language = {en} } @phdthesis{Froitzheim, author = {Froitzheim, Andreas}, title = {Angular momentum transport and pattern formation in medium- and wide-gap turbulent Taylor-Couette flow : an experimental study}, edition = {1. Auflage}, publisher = {Cuvilier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7073-1}, pages = {xxiii, 144}, language = {en} } @phdthesis{Merbold, author = {Merbold, Sebastian}, title = {Experimental investigation on turbulent transport in Taylor-Couette flow}, edition = {1. Auflage}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-7369-7068-7}, pages = {xxviii, 173}, language = {en} } @phdthesis{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} } @misc{GhasemiKleinWilletal., author = {Ghasemi, Abouzar and Klein, Marten and Will, Andreas and Harlander, Uwe}, title = {Mean flow generation by an intermittently unstable boundary layer over a sloping wall}, series = {Journal of Fluid Mechanics}, journal = {Journal of Fluid Mechanics}, number = {vol. 853}, issn = {1750-6859}, doi = {10.1017/jfm.2018.552}, pages = {111 -- 149}, language = {en} } @misc{ZaussingerEgbersTravnikovetal., author = {Zaussinger, Florian and Egbers, Christoph and Travnikov, Vadim and Haun, Peter}, title = {Influence of internal heating on convection in the rotating spherical gap}, series = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, journal = {17th European Turbulence Conference, ETC 2019, September 3 - 6, 2019, Torino, Italy}, address = {Turin}, pages = {1}, language = {en} } @misc{SelvamOenguenerPeixinhoetal., author = {Selvam, Kamal and {\"O}ng{\"u}ner, Emir and Peixinho, Jorge and Zanoun, El-Sayed and Egbers, Christoph}, title = {Wall pressure in developing turbulent pipe flows}, series = {Journal of Fluids Engineering}, volume = {140}, journal = {Journal of Fluids Engineering}, number = {8}, issn = {1528-901X}, pages = {7}, 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{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} } @misc{ZaussingerHaunNebenetal., author = {Zaussinger, Florian and Haun, Peter and Neben, Matthias and Seelig, Torsten and Travnikov, Vadim and Egbers, Christoph and Yoshikawa, Harunori and Mutabazi, Innocent}, title = {Dielectrically driven convection in spherical gap geometry}, series = {Physical Review Fluids}, volume = {3}, journal = {Physical Review Fluids}, number = {9}, issn = {2469-990X}, doi = {10.1103/PhysRevFluids.3.093501}, pages = {093501-1 -- 093501-17}, language = {en} } @misc{OenguenerDittmarMeyeretal., author = {{\"O}ng{\"u}ner, Emir and Dittmar, Mirko and Meyer, Peter and Merbold, Sebastian and Egbers, Christoph}, title = {Cross-sectional PIV analysis in turbulent pipe flow at high Reynolds number}, 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. 31}, language = {en} } @misc{MeyerJongmannsMeieretal., author = {Meyer, Antoine and Jongmanns, Marcel and Meier, Martin and Egbers, Christoph and Mutabazi, Innocent}, title = {Thermal convection in a cylindrical annulus under a combined effect of the radial and vertical gravity}, series = {Comptes Rendus M{\´e}canique}, volume = {345}, journal = {Comptes Rendus M{\´e}canique}, number = {1}, issn = {1631-0721}, pages = {11 -- 20}, language = {en} } @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} } @inproceedings{FuttererLarcherEgbers, author = {Futterer, Birgit and Larcher, Thomas von and Egbers, Christoph}, title = {Das GeoFlow-Experiment auf der ISS: Interferogrammauswertung f{\"u}r die thermische Konvektion im Kugelspalt}, language = {de} } @misc{SeeligHarlanderFaulwetteretal., author = {Seelig, Torsten and Harlander, Uwe and Faulwetter, Robin and Egbers, Christoph}, title = {Irregularity and singular vector growth of the differentially heated rotating annulus flow}, language = {en} } @misc{FuttererKochEgbers, author = {Futterer, Birgit and Koch, Sandy and Egbers, Christoph}, title = {Traveling waves in low and intermediate rotating spherical shell convection}, 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} } @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{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} } @misc{KochHarlanderEgbersetal., author = {Koch, Sandy and Harlander, Uwe and Egbers, Christoph and Hollerbach, Rainer}, title = {Inertial waves in a spherical shell induced by librations of the inner sphere: experimental and numerical results}, series = {Fluid Dynamics Research}, volume = {45}, journal = {Fluid Dynamics Research}, number = {3}, issn = {0169-5983}, doi = {10.1088/0169-5983/45/3/035504}, pages = {035504}, language = {en} } @misc{GorenzHerzogEgbers, author = {Gorenz, Paul and Herzog, Nicoleta and Egbers, Christoph}, title = {Investigation of CO2 release pressures in pipeline cracks}, series = {Energy Procedia}, volume = {40}, journal = {Energy Procedia}, issn = {1876-6102}, pages = {285 -- 293}, language = {en} } @misc{HerzogSchreiberEgbersetal., author = {Herzog, Nicoleta and Schreiber, Matthias and Egbers, Christoph and Krautz, Hans Joachim}, title = {A comparative study of different CFD-codes for numerical simulation of gas-solid fluidized bed hydrodynamics}, series = {Computers and Chemical Engineering}, volume = {39}, journal = {Computers and Chemical Engineering}, issn = {0098-1354}, doi = {10.1016/j.compchemeng.2011.12.002}, pages = {41 -- 46}, language = {en} } @misc{MerboldBrauckmannEgbers, author = {Merbold, Sebastian and Brauckmann, Hannes and Egbers, Christoph}, title = {Torque measurements and numerical determination in differentially rotating wide gap Taylor-Couette flow}, series = {Physical Review E}, volume = {87}, journal = {Physical Review E}, number = {2}, issn = {1550-2376}, doi = {10.1103/PhysRevE.87.023014}, pages = {023014 -1 -- 023014 -4}, 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{ZanounJehringEgbers, author = {Zanoun, El-Sayed and Jehring, Lothar and Egbers, Christoph}, title = {Three measuring techniques for assessing the mean wall skin friction in wall-bounded flows}, series = {Thermophysics and Aeromechanics}, volume = {21}, journal = {Thermophysics and Aeromechanics}, number = {2}, issn = {1531-8699}, pages = {179 -- 190}, language = {en} } @misc{HerzogGorenzEgbers, author = {Herzog, Nicoleta and Gorenz, Paul and Egbers, Christoph}, title = {CFD modeling of high pressurized CO2 released from onshore pipeline leakages}, series = {Environmental Earth Sciences}, volume = {80}, journal = {Environmental Earth Sciences}, number = {8}, issn = {1866-6299}, doi = {10.1007/s12665-013-2536-3}, pages = {3749 -- 3759}, 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} } @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} } @incollection{JehringZanoun, author = {Jehring, Lothar and Zanoun, El-Sayed}, title = {Reducing environmental impact by mean of active flow control}, 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} } @misc{ScurtuStueckeEgbers, author = {Scurtu, Nicoleta and St{\"u}cke, Peter and Egbers, Christoph}, title = {A Numerical Study of the Three-dimensional Structure of the Taylor-Couette Flow in Eccentric Configuration with Superimposed Cross Flow}, 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} } @misc{KochHarlanderEgbers, author = {Koch, Sandy and Harlander, Uwe and Egbers, Christoph}, title = {Wave-attractors and mean flow in a spherical shell due to time-modulated rotation}, 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{ZanounKitoEgbers, author = {Zanoun, El-Sayed and Kito, Mizuki and Egbers, Christoph}, title = {A Study on Flow Transition and Development in Circular and Rectangular Ducts}, language = {en} } @misc{ZanounDurst, author = {Zanoun, El-Sayed and Durst, F.}, title = {Momentum transport and turbulent kinetic energy production in plane-channel flow}, language = {en} } @incollection{SomosvariMeierBabcsan, author = {Somosvari, B. and Meier, M. and Babcsan, N.}, title = {Experiments on particle loaded aqueous foams}, language = {en} } @article{SmieszekCrumeyrolleMutabazietal., author = {Smieszek, Marlene and Crumeyrolle, Olivier and Mutabazi, Innocent and Egbers, Christoph}, title = {Instabilities with polyacrylamide solution in small and large aspect ratios Taylor-Couette systems}, language = {en} } @incollection{ZanounDurstEgbers, author = {Zanoun, El-Sayed and Durst, F. and Egbers, Christoph}, title = {Mean Flow Properties in Smooth Pipe Flow Experiment}, 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} }