@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{VeenHuismanMerboldetal., author = {Veen, Roeland C. A. van der and Huisman, Sander G. and Merbold, Sebastian and Harlander, Uwe and Egbers, Christoph and Lohse, Detlef and Sun, Chao}, title = {Taylor Couette turbulence at radius ratio =0,5:scaling, flow structures and plumes}, series = {Journal of Fluid Mechanics}, volume = {799}, journal = {Journal of Fluid Mechanics}, issn = {1469-7645}, doi = {10.1017/jfm.2016.352}, pages = {334 -- 351}, language = {en} } @misc{HoffHarlanderTriana, author = {Hoff, Michael and Harlander, Uwe and Triana, Santiago Andr{\´e}s}, title = {Study of turbulence and interacting inertial modes in a differentially rotating sphericel shell experiment}, series = {Physical Review Fluids}, volume = {1}, journal = {Physical Review Fluids}, number = {4}, doi = {10.1103/PhysRevFluids.1.043701}, pages = {043701}, language = {en} } @inproceedings{SeeligHarlander, author = {Seelig, Torsten and Harlander, Uwe}, title = {Can zonally symmetric inertial waves drive an oscillating mean flow?}, series = {European Geosciences Union, General Assembly 2016, Vienna, Austria}, booktitle = {European Geosciences Union, General Assembly 2016, Vienna, Austria}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{HoffHarlanderEgbersetal., author = {Hoff, Michael and Harlander, Uwe and Egbers, Christoph and Triana, Santiago Andr{\´e}s}, title = {Interacting inertial modes and their instability in a differentially rotating spherical gap flow}, series = {Book of abstracts, 31st IUGG Conference on Mathematical Geophysics 6 - 10 June 2016 Paris, France}, booktitle = {Book of abstracts, 31st IUGG Conference on Mathematical Geophysics 6 - 10 June 2016 Paris, France}, pages = {S. 37}, language = {en} } @inproceedings{SeeligBurchardtKrebsetal., author = {Seelig, Torsten and Burchardt, Martin and Krebs, Andreas and Harlander, Uwe and Egbers, Christoph}, title = {PIV measurements in an axially stratified Taylor-Couette experiment}, series = {Book of abstracts, School ISTROF 2016, Instabilities and Turbulence in Strato-Rotational Flows, July 11-13th, 2016, Le Havre}, booktitle = {Book of abstracts, School ISTROF 2016, Instabilities and Turbulence in Strato-Rotational Flows, July 11-13th, 2016, Le Havre}, language = {en} } @inproceedings{HoffHarlanderEgbersetal., author = {Hoff, Michael and Harlander, Uwe and Egbers, Christoph and Triana, Santiago Andr{\´e}s}, title = {Interacting inertial modes in a differentially rotating spherical gap flow experiment}, 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. 12}, 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{HoffHarlanderTrianaetal., author = {Hoff, Michael and Harlander, Uwe and Triana, Santiago Andr{\´e}s and Egbers, Christoph}, title = {Inertial modes and their transition to turbulence in a differentially rotating spherical gap flow}, series = {European Geosciences Union, General Assembly 2016, Vienna, Austria, 17-22. April 2016}, booktitle = {European Geosciences Union, General Assembly 2016, Vienna, Austria, 17-22. April 2016}, 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} } @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} }