@misc{HarlanderWangAlexandrovetal., author = {Harlander, Uwe and Wang, Yongtai and Alexandrov, Kiril and Seelig, Torsten and Egbers, Christoph}, title = {Intercomparison of numerical models simulating rotating annulus flows}, language = {en} } @misc{EgbersGellertHarlanderetal., author = {Egbers, Christoph and Gellert, Marcus and Harlander, Uwe and Wang, Yongtai and R{\"u}diger, G{\"u}nther}, title = {Investigation of Stratorotational Instability (SRI) in Taylor-Couette flows with axial temperature gradient}, language = {en} } @misc{HarlanderSeeligFaulwetter, author = {Harlander, Uwe and Seelig, Torsten and Faulwetter, Robin}, title = {Singular vector growth in different flow regimes of the differentially heated rotating annulus}, language = {en} } @misc{KochHarlanderHollerbachetal., author = {Koch, Sandy and Harlander, Uwe and Hollerbach, Rainer and Egbers, Christoph}, title = {Laboratory experiment of inertial wave-interactions in a rotating spherical shell}, language = {en} } @misc{KochHarlanderHollerbachetal., author = {Koch, Sandy and Harlander, Uwe and Hollerbach, Rainer and Egbers, Christoph}, title = {Laboratory experiments and numerical simulations of inertial wave-interactions in a rotating spherical shell}, language = {en} } @inproceedings{BorciaHarlander, author = {Borcia, Ion-Dan and Harlander, Uwe}, title = {Inertial waves inside a liquid confined between two rotating coaxial cylinders: the case of small Ekman number}, language = {en} } @inproceedings{BorciaSeeligHarlanderetal., author = {Borcia, Ion-Dan and Seelig, Torsten and Harlander, Uwe and Egbers, Christoph}, title = {Inertial waves in rotating cylindrical geometry: mean flow interactions and attractors}, language = {en} } @inproceedings{AlexandrovHarlanderEgbers, author = {Alexandrov, Kiril and Harlander, Uwe and Egbers, Christoph}, title = {Spatial spectra of regular and irregular rotating annulus flows: Statistical scale classification in terms of empirical orthogonal functions}, language = {en} } @inproceedings{KochHarlanderHollerbachetal., author = {Koch, Sandy and Harlander, Uwe and Hollerbach, Rainer and Egbers, Christoph}, title = {Laboratory experiment and numerical simulations of inertial wave interactions in a rotating spherical shell}, 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{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{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{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} } @misc{HarlanderWenzelAlexandrovetal., author = {Harlander, Uwe and Wenzel, Julia and Alexandrov, Kiril and Wang, Yongtai and Egbers, Christoph}, title = {Simultaneous PIV- and thermography-measurements of partially blocked flow in a heated rotating annulus}, series = {Experiments in Fluids}, volume = {52}, journal = {Experiments in Fluids}, number = {4}, issn = {1432-1114}, doi = {10.1007/s00348-011-1195-y}, pages = {1077 -- 1087}, language = {de} } @inproceedings{HarlanderWrightEgbers, author = {Harlander, Uwe and Wright, G. B. and Egbers, Christoph}, title = {Reconstruction of the 3D flow field in a differentially heated rotating annulus by synchronized particle image velocimetry and infrared thermography measurements}, series = {16th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 09-12 July, Proceedings, Calouste Gulbenkian Foundation, Lisbon, Portugal}, booktitle = {16th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 09-12 July, Proceedings, Calouste Gulbenkian Foundation, Lisbon, Portugal}, language = {en} } @inproceedings{SeeligHarlanderBorciaetal., author = {Seelig, Torsten and Harlander, Uwe and Borcia, Ion-Dan and Egbers, Christoph}, title = {Zonal mean flow excitation due to inertial waves propagating in the meridional plane}, series = {European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April}, booktitle = {European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April}, language = {en} } @inproceedings{HarlanderWrightEgbers, author = {Harlander, Uwe and Wright, G. B. and Egbers, Christoph}, title = {Reconstruction of the 3D flow field in a differentially heated rotating annulus laboratory experiment}, series = {European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April}, booktitle = {European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April}, language = {en} } @inproceedings{KochHarlanderHollerbachetal., author = {Koch, Sandy and Harlander, Uwe and Hollerbach, Rainer and Egbers, Christoph}, title = {Inertial waves in a rotating spherical shell: Comparison between numerical simulations and laboratory experiments}, series = {European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April}, booktitle = {European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April}, language = {en} } @inproceedings{BorciaHarlanderSeeligetal., author = {Borcia, Ion-Dan and Harlander, Uwe and Seelig, Torsten and Egbers, Christoph}, title = {Comparing attractor frequency bands with eigen frequencies for a confined rotating fluid}, series = {European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April}, booktitle = {European Geosciences Union (EGU), 9th General Assembly, Vienna, Austria, 22-27 April}, language = {en} } @inproceedings{BorciaHarlanderSeeligetal., author = {Borcia, Ion-Dan and Harlander, Uwe and Seelig, Torsten and Egbers, Christoph}, title = {Comparing the spectrum of wave attractor frequency bands and the eigenspectrum of fluid in a rotating annulus with inclined inner cylinder}, series = {Book of abstracts, 9th European Fluid Mechanics Conference (EFMC), 9-13 September, Rome, Italy}, booktitle = {Book of abstracts, 9th European Fluid Mechanics Conference (EFMC), 9-13 September, Rome, Italy}, language = {en} } @inproceedings{SeeligHarlanderBorciaetal., author = {Seelig, Torsten and Harlander, Uwe and Borcia, Ion-Dan and Scurtu, Nicoleta and Egbers, Christoph and Klein, Marten and Ghasemi, Abouzar and Will, Andreas and Schaller, Eberhard}, title = {Inertial waves in rotating cylindrical annulus: theory, experiment and simulations}, series = {Book of abstracts, 9th European Fluid Mechanics Conference (EFMC), 9-13 September, Rome, Italy}, booktitle = {Book of abstracts, 9th European Fluid Mechanics Conference (EFMC), 9-13 September, Rome, Italy}, language = {en} } @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} } @inproceedings{KochHarlanderHollerbachetal., author = {Koch, Sandy and Harlander, Uwe and Hollerbach, Rainer and Egbers, Christoph}, title = {Inertial waves in a spherical shell induced by librations of the inner sphere: experimental and numerical results}, 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} } @inproceedings{SeeligBorciaKleinetal., author = {Seelig, Torsten and Borcia, Ion-Dan and Klein, Marten and Ghasemi, Abouzar and Will, Andreas and Egbers, Christoph and Schaller, Eberhard and Harlander, Uwe}, title = {Inertial waves and wave attractors in a rotating annulus with inner or outer cylinder libration}, 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} } @inproceedings{VinczeHarlanderLarcheretal., author = {Vincze, Miklos and Harlander, Uwe and Larcher, Thomas von and Egbers, Christoph}, title = {An experimental study of baroclinic wave transitions in a differentially heated rotating annulus with sloping bottom topography}, series = {European Turbulence Conference 14 (ETC), 1-4 September 2013, ENS Lyon, France}, booktitle = {European Turbulence Conference 14 (ETC), 1-4 September 2013, ENS Lyon, France}, pages = {2}, 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{BorciaHarlander, author = {Borcia, Ion-Dan and Harlander, Uwe}, title = {Inertial waves in a rotating annulus with inclined inner cylinder: comparing the spectrum of wave attractor frequency bands and the eigenspectrum in the limit of zero inclination}, series = {Theoretical and Computational Fluid Dynamics}, volume = {27}, journal = {Theoretical and Computational Fluid Dynamics}, number = {3-4}, issn = {1432-2250}, doi = {10.1007/s00162-012-0278-6}, pages = {397 -- 413}, language = {en} } @inproceedings{VinczeHarlanderEgbers, author = {Vincze, Miklos and Harlander, Uwe and Egbers, Christoph}, title = {An experimental study on the co-existence of topographic waves and baroclinic instability in a differentially heated rotating annulus}, series = {18. International Coyette-Taylor Workshop, University of Twente, Enschede The Netherlands, 24. - 26. june 2013}, booktitle = {18. International Coyette-Taylor Workshop, University of Twente, Enschede The Netherlands, 24. - 26. june 2013}, address = {Enschede}, pages = {S. 67}, 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{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{VinczeBorchertAchatzetal., author = {Vincze, Miklos and Borchert, Sebastian and Achatz, Ulrich and Larcher, Thomas von and Baumann, Martin and Liersch, Claudia and Remmler, Sebastian and Beck, Teresa and Alexandrov, Kiril and Egbers, Christoph and Fr{\"o}hlich, Jochen and Heuveline, Vincent and Hickel, Stefan and Harlander, Uwe}, title = {Benchmarking in a rotating annulus: a comparative experimental and numerical study of baroclinic wave dynamics}, series = {Meteorologische Zeitschrift}, volume = {23}, journal = {Meteorologische Zeitschrift}, number = {6}, issn = {1610-1227}, doi = {10.1127/metz/2014/0600}, pages = {611 -- 635}, language = {en} } @misc{SeeligKielczewskiTuliszkaSznitkoetal., author = {Seelig, Torsten and Kielczewski, Kamil and Tuliszka-Sznitko, Ewa M. and Harlander, Uwe and Egbers, Christoph and Bontoux, Patrick}, title = {Taylor-Couette flow with asymmetric end-walls boundary conditions}, series = {15th European turbulence conference (ETC), Delft, The Netherlands (2015)}, journal = {15th European turbulence conference (ETC), Delft, The Netherlands (2015)}, language = {en} } @inproceedings{KleinGhasemiSeeligetal., author = {Klein, Marten and Ghasemi, Abouzar and Seelig, Torsten and Borcia, Ion-Dan and Harlander, Uwe and Will, Andreas}, title = {DNS of inertial wave attractors in a librating annulus with height-dependent gap width}, series = {15th European turbulence conference (ETC), Delft, The Netherlands (2015)}, booktitle = {15th European turbulence conference (ETC), Delft, The Netherlands (2015)}, abstract = {Direct numerical simulations (DNS) of inertial wave attractors have been carried out in a librating Taylor-Couette system with broken mirror symmetry in the radial-axial cross-section. The inertial wave excitation mechanism and its localisation at the edges was clarified by applying boundary layer theory. Additional resonance peaks in the simulated response spectra were found to agree with low-order wave attractors obtained by geometric ray tracing. Numerics and theory are in qualitative agreement with recent lab experiments.}, language = {en} } @inproceedings{SeeligGhasemiKurganskyetal., author = {Seelig, Torsten and Ghasemi, Abouzar and Kurgansky, Michael V. and Klein, Marten and Will, Andreas and Harlander, Uwe}, title = {Mean flow generation due to longitudinal librations of sidewalls of a rotating annulus}, series = {15th European turbulence conference (ETC), Delft, The Netherlands (2015)}, booktitle = {15th European turbulence conference (ETC), Delft, The Netherlands (2015)}, 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{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} } @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} } @inproceedings{HarlanderSeeligGellertetal., author = {Harlander, Uwe and Seelig, Torsten and Gellert, Marcus and Viazzo, Stephane and Randriamampianina, Anthony and Egbers, Christoph and R{\"u}diger, G{\"u}nther}, title = {Stratorotational instability: nonlinear aspects at higher reynolds numbers}, series = {EUROMECH Colloquium 567, Turbulent mixing in stratified flows 22-25 March 2015, DAMTP, Centre for Mathematical Sciences, Cambridge}, booktitle = {EUROMECH Colloquium 567, Turbulent mixing in stratified flows 22-25 March 2015, DAMTP, Centre for Mathematical Sciences, Cambridge}, pages = {1}, language = {en} } @inproceedings{HarlanderSeeligGellertetal., author = {Harlander, Uwe and Seelig, Torsten and Gellert, Marcus and Viazzo, Stephane and Randriamampianina, Anthony and Egbers, Christoph and R{\"u}diger, G{\"u}nther}, title = {Stratorotational instability in a thermally stratified taylor-couette flow}, series = {European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015}, booktitle = {European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{SeeligHarlander, author = {Seelig, Torsten and Harlander, Uwe}, title = {Can meridionally propagating inertial waves drive an oscillating mean flow?}, series = {European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015}, booktitle = {European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{KleinGhasemiSeeligetal., author = {Klein, Marten and Ghasemi, Abouzar and Seelig, Torsten and Borcia, Ion-Dan and Harlander, Uwe and Will, Andreas}, title = {Mean flow generation and inertial wave attractors in a librating annulus: DNS and theory}, 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{RandriamampianinaHarlanderVinczeetal., author = {Randriamampianina, Anthony and Harlander, Uwe and Vincze, Miklos and Seelig, Torsten and Larcher, Thomas von and Viazzo, Stephane}, title = {Inertia gravity waves linked to baroclinic waves in a rotating, differentially heated annulus with an upper free surface}, series = {ICTW 19 Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, booktitle = {ICTW 19 Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, address = {Cottbus}, pages = {38 -- 39}, language = {en} } @inproceedings{LarcherHarlanderSeeligetal., author = {Larcher, Thomas von and Harlander, Uwe and Seelig, Torsten and Randriamampianina, Anthony and Viazzo, Stephane and Vincze, Miklos}, title = {Multiple scales in the thermally driven rotating annulus: time-series data analysis of experiments and numerics}, series = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, booktitle = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, address = {Cottbus}, pages = {40 -- 41}, language = {en} } @inproceedings{SeeligHarlanderKielczewskietal., author = {Seelig, Torsten and Harlander, Uwe and Kielczewski, Kamil and Tuliszka-Sznitko, Ewa M. and Bontoux, Patrick and Egbers, Christoph}, title = {Study of transitional and turbulent flows in rotor/stator cavities}, series = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, booktitle = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, address = {Cottbus}, pages = {118 -- 119}, language = {en} } @inproceedings{KleinGhasemiSeeligetal., author = {Klein, Marten and Ghasemi, Abouzar and Seelig, Torsten and Borcia, Ion-Dan and Harlander, Uwe and Will, Andreas}, title = {DNS of inertial wave attractors in a librating annular cavity with a height-dependent gap}, series = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, booktitle = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, address = {Cottbus}, pages = {122 -- 123}, language = {en} } @inproceedings{HarlanderSeeligStapelfeldetal., author = {Harlander, Uwe and Seelig, Torsten and Stapelfeld, Ludwig and Gellert, Marcus and Viazzo, Stephane and Randriamampianina, Anthony and Egbers, Christoph and R{\"u}diger, G{\"u}nther}, title = {Stratorotational Instability: nonlinear aspects at higher Reynolds numbers}, series = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, booktitle = {ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany}, address = {Cottbus}, pages = {132 -- 133}, language = {en} } @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} } @inproceedings{KleinBorciaEgbersetal., author = {Klein, Marten and Borcia, Ion-Dan and Egbers, Christoph and Ghasemi, Abouzar and Harlander, Uwe and Kurgansky, Michael V. and Schaller, Eberhard and Seelig, Torsten and Will, Andreas}, title = {Inertial Waves and Wave Excitation Mechanisms in Annular Cavities: Simulations, Experiments and Theory}, series = {European Turbulence Conference ETC14, Lyon, 2013}, booktitle = {European Turbulence Conference ETC14, Lyon, 2013}, pages = {2}, language = {en} } @inproceedings{KleinGhasemiHarlanderetal., author = {Klein, Marten and Ghasemi, Abouzar and Harlander, Uwe and Will, Andreas}, title = {Inertial wave excitation and wave attractors in a librating annulus: DNS}, series = {European Geosciences Union, General Assembly 2014, Vienna, Austria, 27 April - 02 May 2014}, booktitle = {European Geosciences Union, General Assembly 2014, Vienna, Austria, 27 April - 02 May 2014}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, 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{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{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} } @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{WillHarlanderMetz, author = {Will, Andreas and Harlander, Uwe and Metz, Werner}, title = {Climatological relevance of leading seasonal singular vectors. Part I: Energy, enstrophy and spatio - temporal variability}, series = {Meteorologische Zeitschrift}, volume = {15}, journal = {Meteorologische Zeitschrift}, number = {4}, issn = {1610-1227}, doi = {10.1127/0941-2948/2006/0145}, pages = {1 -- 10}, abstract = {Fast growing atmospheric Rossby wave trains (RWT modes) are solutions of a Singular Vector (SV) analysis of a damped barotropic vorticity equation for northern winter basic flows. Using 40 DJF basic flows RWT modes are found over four regions of the globe only. Their propagation paths are remarkably constant for development times up to 96 h, but spread for longer times. The RWT mode with the largest 4 day growth rate develops over the North-Pacific (NPAC) region for each of the observed DJF basic flows considered. This mode is referred to as NPAC-mode. The eigenvalues, which are the 4 day kinetic energy growth factors of the NPAC mode, range from 10 to 24 for nearly all of the basic flows. In some exceptional years they are close to 30. The NPAC modes with moderate growth factors could be shown to be approximate solutions of the nonlinear model equation. Hereto a new formulation of the advection term provided by the energy-vortex theory was used. It appears that the constancy of propagation paths and the mode's shapes, the large growth factors and the validity of the linearization assumption up to development times of 96h make the NPAC mode a candidate to explain substantial parts of large scale interannual atmospheric variability in the North Pacific region.}, language = {en} } @misc{VinczeBorciaHarlander, author = {Vincze, Mikl{\´o}s and Borcia, Ion-Dan and Harlander, Uwe}, title = {Temperature fluctuations in a changing climate: an ensemble-based experimental approach}, series = {Scientific Reports}, volume = {7}, journal = {Scientific Reports}, issn = {2045-2322}, doi = {10.1038/s41598-017-00319-0}, pages = {254}, language = {en} } @inproceedings{LarcherViazzoRandriamampianinaetal., author = {Larcher, Thomas von and Viazzo, Stephane and Randriamampianina, Anthony and Harlander, Uwe}, title = {Small-scale flow patterns at the vertical sidewalls of the thermally driven rotating annulus}, series = {European Geosciences Union General Assembly 2017 Vienna, Austria, 23-28 April 2017}, booktitle = {European Geosciences Union General Assembly 2017 Vienna, Austria, 23-28 April 2017}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{RoddaBorciaHarlander, author = {Rodda, Costanza and Borcia, Ion-Dan and Harlander, Uwe}, title = {Baroclinic wave laboratory experiment with radial heating and vertical stratification to study IGW emission from baroclinic fronts}, series = {European Geosciences Union General Assembly 2017 Vienna, Austria, 23-28 April 2017}, booktitle = {European Geosciences Union General Assembly 2017 Vienna, Austria, 23-28 April 2017}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{MerboldHarlanderEgbers, author = {Merbold, Sebastian and Harlander, Uwe and Egbers, Christoph}, title = {Physics of rotating fluids, a DFG core facility centre}, series = {88th Annual Meeting of the International Association of Applied Mathematics and Mechanics GAMM, March 6-10, 2017, Weimar, Germany, Book of abstracts}, booktitle = {88th Annual Meeting of the International Association of Applied Mathematics and Mechanics GAMM, March 6-10, 2017, Weimar, Germany, Book of abstracts}, pages = {S. 355}, language = {en} } @misc{RuedigerSeeligSchultzetal., author = {R{\"u}diger, G{\"u}nther and Seelig, Torsten and Schultz, M. and Gellert, Marcus and Egbers, Christoph and Harlander, Uwe}, title = {The stratorotational instability of Taylor-Couette flows with moderate Reynolds numbers}, series = {Geophysical \& Astrophysical Fluid Dynamics}, volume = {111}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, number = {6}, issn = {0309-1929}, doi = {10.1080/03091929.2017.1382487}, pages = {429 -- 447}, language = {en} } @inproceedings{MalteseMelettideOliveiraRaspoSeeligetal., author = {Maltese Meletti de Oliveira, Gabriel and Raspo, Isabelle and Seelig, Torsten and Viazzo, Stephane and Randriamampianina, Anthony and Abide, St{\´e}phane and Krebs, Andreas and Harlander, Uwe}, title = {On the instability of radially sheared and axially stratified vortex flow}, series = {European Geosciences Union, General Assembly 2018, Vienna, Austria}, booktitle = {European Geosciences Union, General Assembly 2018, Vienna, Austria}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{BorciaBorciaBestehornetal., author = {Borcia, Ion-Dan and Borcia, Rodica and Bestehorn, Michael and Xu, Wenchao and Harlander, Uwe}, title = {Surface waves generated by libration in a circular channel}, series = {The 12th European Fluid Mechanics Conference, 9 September 2018 - 13 September 2018, Vienna, Austria}, booktitle = {The 12th European Fluid Mechanics Conference, 9 September 2018 - 13 September 2018, Vienna, Austria}, pages = {1}, language = {en} } @misc{RoddaBorciaLeGaletal., author = {Rodda, Costanza and Borcia, Ion-Dan and Le Gal, Patrice and Vincze, Miklos and Harlander, Uwe}, title = {Baroclinic, Kelvin and inertia-gravity waves in the barostrat instability experiment}, series = {Geophysical \& Astrophysical Fluid Dynamics}, volume = {112}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, number = {3}, issn = {1029-0419}, doi = {10.1080/03091929.2018.1461858}, pages = {175 -- 206}, 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} } @inproceedings{RoddaBorciaHienetal., author = {Rodda, Costanza and Borcia, Ion-Dan and Hien, Steffen and Achatz, Ulrich and Le Gal, Patrice and Harlander, Uwe}, title = {Numerical and experimental study of inertia-gravity waves in the differentially heated rotating annulus}, series = {European Geosciences Union, General Assembly 2018, Vienna, Austria, 8-13 April 2018}, booktitle = {European Geosciences Union, General Assembly 2018, Vienna, Austria, 8-13 April 2018}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @misc{HarlanderBorciaKrebs, author = {Harlander, Uwe and Borcia, Ion-Dan and Krebs, Andreas}, title = {Nonnormality increases variance of gravity waves trapped in a tilted box}, series = {Geophysical \& Astrophysical Fluid Dynamics}, volume = {113}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, number = {5/6}, issn = {1029-041}, doi = {10.1080/03091929.2018.1549660}, pages = {602 -- 622}, language = {en} } @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{LarcherViazzoHarlanderetal., author = {Larcher, Thomas von and Viazzo, Stephane and Harlander, Uwe and Vincze, Miklos}, title = {Instabilities and small-scale waves within the Stewartson layers of a thermally driven rotating annulus}, series = {Journal of Fluid Mechanics}, journal = {Journal of Fluid Mechanics}, number = {vol. 841}, issn = {1750-6859}, doi = {10.1017/jfm.2018.10}, pages = {380 -- 407}, language = {en} } @misc{BorciaBorciaBestehornetal., author = {Borcia, Ion-Dan and Borcia, Rodica and Bestehorn, Michael and Richter, Stefan and Xu, Wenchao and Harlander, Uwe}, title = {Horizontal Faraday instability and parametric excitation in a circular channel}, series = {GAMM 2019, 90th Annual Meeting of the International Assoociation of Applied Mathematics and Mechanics, February 18-22, 2019, Vienna, Austria}, journal = {GAMM 2019, 90th Annual Meeting of the International Assoociation of Applied Mathematics and Mechanics, February 18-22, 2019, Vienna, Austria}, publisher = {TU Verlag}, address = {Wien}, isbn = {978-3-903024-84-7}, pages = {338}, language = {en} } @misc{RoddaHienAchatzetal., author = {Rodda, Costanza and Hien, Steffen and Achatz, Ulrich and Borcia, Ion-Dan and Le Gal, Patrice and Vincze, Miklos and Harlander, Uwe}, title = {Differentially heated rotating annulus experiments to study gravity wave emission from jets and fronts}, 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{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{BorciaBorciaRichteretal., author = {Borcia, Ion-Dan and Borcia, Rodica and Richter, Sebastian and Xu, Wenchao and Bestehorn, Michael and Harlander, Uwe}, title = {Horizontal Faraday instability in a circular channel}, series = {Proceedings in Applied Mathematics and Mechanics (PAMM)}, volume = {19}, journal = {Proceedings in Applied Mathematics and Mechanics (PAMM)}, number = {1}, issn = {1617-7061}, doi = {10.1002/pamm.201900242}, pages = {2}, abstract = {We study surface waves in a circular channel placed on a rotating table. The tank can rotate with constant velocity and/or can oscillate. For a glycerin-water-solution with high viscosity, oscillation amplitudes about 20 cm and frequencies of 0.5 Hz, we observe surface patterns generated by a parametric instability. The circular geometry of the channel assures in a natural way the periodic lateral boundary conditions often used in the numerical simulations. Up to our knowledge this is the first experiment which evidences the horizontal Faraday instability in a container without walls blocking the flow in the oscillation direction. Experimental and numerical results are compared and discussed.}, language = {en} } @misc{BorciaBorciaXuetal., author = {Borcia, Ion-Dan and Borcia, Rodica and Xu, Wenchao and Bestehorn, Michael and Richter, Sebastian and Harlander, Uwe}, title = {Undular bores in a large circular channel}, series = {European Journal of Mechanics - B/Fluids}, volume = {79}, journal = {European Journal of Mechanics - B/Fluids}, issn = {0997-7546}, doi = {10.1016/j.euromechflu.2019.09.003}, pages = {67 -- 73}, abstract = {An experimental device previously developed for studying rotating baroclinic flows has been used to investigate undular bores formation, propagation and collision. Up to our knowledge this is the first experimental study of undular bores in a circular channel. For a setup without barriers, this geometry accomplishes in a natural way the periodic lateral boundary conditions, very often used in numerical simulations. An excellent agreement between the experiment and simulation has been achieved. The spatio-temporal structure of bores is well reproduced for the first few reflections or collisions.}, language = {en} } @misc{KurganskySeeligKleinetal., author = {Kurgansky, Michael V. and Seelig, Torsten and Klein, Marten and Will, Andreas and Harlander, Uwe}, title = {Mean flow generation due to longitudinal librations of sidewalls of a rotating annulus}, series = {Geophysical \& Astrophysical Fluid Dynamics}, volume = {114}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, number = {6}, issn = {1029-0419}, doi = {10.1080/03091929.2019.1692829}, pages = {762}, abstract = {Laboratory experiments with a rotating cylindrical annulus arereported that reveal a prograde jet, which is adjacent to a (longitu-dinally) librating inner straight cylindrical wall. Here, wall libration isrealised as a time-harmonic modulation of the inner cylinder's rota-tion rate. The outer cylindrical wall and bottom and top lids rotatewith constant angular velocity. The main purpose of our study is tocontribute to a qualitative and quantitative understanding of non-linearities that are present in oscillating, but centrifugally stable,vertical boundary layers frequently encountered in rotating wall-bounded flows. We consider a problem that is in a sense comple-mentary to that of previous works that focused on oscillating Ekmanlayers but neglected the vertical Stokes-Stewartson layers. A sim-ple analytical model is proposed that is able to predict the magni-tude and spatial structure of the emerging prograde near-wall jet interms of nonlinearity inherent in the inner cylinder's boundary layerdynamics.}, 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{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{Harlander, author = {Harlander, Uwe}, title = {Comparison of paradigmatic gravity wave models for ocean and atmosphere}, series = {EGU General Assembly 2020, Online | 4-8 May 2020}, journal = {EGU General Assembly 2020, Online | 4-8 May 2020}, doi = {10.5194/egusphere-egu2020-7222}, language = {en} } @misc{VinczeBozokiHereinetal., author = {Vincze, Miklos and Boz{\´o}ki, Tam{\´a}s and Herein, M{\´a}ty{\´a}s and Borcia, Ion-Dan and Rodda, Costanza and P{\´a}lfy, J{\´o}zsef and Nyerges, Anita and Harlander, Uwe}, title = {Climate impact of the Drake Passage opening: lessons from a minimalistic laboratory experiment}, series = {EGU General Assembly 2020, Online | 4-8 May 2020}, journal = {EGU General Assembly 2020, Online | 4-8 May 2020}, doi = {10.5194/egusphere-egu2020-5004}, language = {en} } @misc{FruehSzaboEgbersetal., author = {Fr{\"u}h, Wolf-Gerrit and Szabo, Peter and Egbers, Christoph and Harlander, Uwe}, title = {Locating sources of variability in the transition to Structural Vacillation in the baroclinic annulus}, series = {EGU General Assembly 2020, Online | 4-8 May 2020}, journal = {EGU General Assembly 2020, Online | 4-8 May 2020}, doi = {10.5194/egusphere-egu2020-7262}, language = {en} } @misc{HarlanderHenseWilletal., author = {Harlander, Uwe and Hense, Andreas and Will, Andreas and Kurgansky, Michael V.}, title = {New aspects of geophysical fluid dynamics}, series = {Meteorologische Zeitschrift}, volume = {15}, journal = {Meteorologische Zeitschrift}, number = {4}, doi = {10.1127/0941-2948/2006/0144}, pages = {388}, 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} } @misc{VinczeBozokiHereinetal., author = {Vincze, Miklos and Boz{\´o}ki, Tam{\´a}s and Herein, M{\´a}ty{\´a}s and Borcia, Ion-Dan and Harlander, Uwe and Horics{\´a}nyi, Attila and Nyerges, Anita and Rodda, Costanza and P{\´a}l, Andr{\´a}s and P{\´a}lfy, J{\´o}zsef}, title = {The Drake Passage opening from an experimental fluid dynamics point of view}, series = {SScientific Reports}, volume = {11}, journal = {SScientific Reports}, issn = {2045-2322}, doi = {10.1038/s41598-021-99123-0}, pages = {11}, language = {en} } @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} } @misc{HarlanderKurgansky, author = {Harlander, Uwe and Kurgansky, Michael V.}, title = {Two-dimensional internal gravity wave beam instability. Linear theory and subcritical instability}, series = {Geophysical \& Astrophysical Fluid Dynamics}, journal = {Geophysical \& Astrophysical Fluid Dynamics}, issn = {1029-0419}, doi = {10.1080/03091929.2021.1943379}, language = {en} } @misc{LeGalHarlanderBorciaetal., author = {Le Gal, Patrice and Harlander, Uwe and Borcia, Ion-Dan and Le Diz{\`e}s, St{\´e}phane and Chen, J. and Favier, Benjamin}, title = {Instability of vertically stratified horizontal plane Poiseuille flow}, series = {Journal of Fluid Mechanics}, volume = {907}, journal = {Journal of Fluid Mechanics}, number = {R1}, issn = {1469-7645}, doi = {10.1017/jfm.2020.917}, pages = {1 -- 14}, language = {en} } @misc{HarlanderBorciaVinczeetal., author = {Harlander, Uwe and Borcia, Ion-Dan and Vincze, Miklos and Rodda, Costanza}, title = {Probability Distribution of Extreme Events in a Baroclinic Wave Laboratory Experiment}, series = {Fluids}, volume = {7}, journal = {Fluids}, number = {8}, issn = {2311-5521}, doi = {10.3390/fluids7080274}, abstract = {Atmospheric westerly jet streams are driven by temperature differences between low and high latitudes and the rotation of the Earth. Meandering jet streams and propagating Rossby waves are responsible for the variable weather in the mid-latitudes. Moreover, extreme weather events such as heat waves and cold spells are part of the jet stream dynamics. For many years, a simple analog in the form of a simplified laboratory experiment, the differentially heated rotating annulus, has provided insight into the dynamics of the meandering jet stream. In the present study, probability density distributions of extreme events from a long-term laboratory experiment are studied and compared to the atmospheric probability density distributions. Empirical distributions of extreme value monthly block data are derived for the experimental and atmospheric cases. Generalized extreme value distributions are adjusted to the empirical distributions, and the distribution parameters are compared. Good agreement was found, but the distributions of the experimental data showed a shift toward larger extreme values, and some explanations for this shift are suggested. The results indicate that the laboratory model might be a useful tool for investigating changes in extreme event distributions due to climate change. In the laboratory context, the change can be modeled by an increase in total temperature accompanied by a reduction in the radial heat contrast.}, language = {en} } @misc{RoddaHarlanderVincze, author = {Rodda, Costanza and Harlander, Uwe and Vincze, Miklos}, title = {Jet stream variability in a polar warming scenario - a laboratory perspective}, series = {Weather and Climate Dynamics}, volume = {3}, journal = {Weather and Climate Dynamics}, number = {3}, issn = {2698-4016}, doi = {10.5194/wcd-3-937-2022}, pages = {937 -- 950}, language = {en} } @misc{BorciaRichterBorciaetal., author = {Borcia, Ion-Dan and Richter, Sebastian and Borcia, Rodica and Sch{\"o}n, Franz-Theo and Harlander, Uwe and Bestehorn, Michael}, title = {Wave propagation in a circular channel: sloshing and resonance}, series = {The European Physical Journal Special Topics}, volume = {Vol. 232}, journal = {The European Physical Journal Special Topics}, number = {4}, issn = {1951-6401}, doi = {10.1140/epjs/s11734-023-00790-z}, pages = {461 -- 468}, abstract = {Surface wave resonance of a liquid (water) layer confined in a circular channel is studied both experimentally and numerically. For the experiment, eight unevenly distributed ultrasonic distance sensors measure the local height of the wave surface. The resonance curves show maxima only for odd multiples of the fundamental resonance frequency . We explained this behavior using a simple intuitive "ping-pong" like model. Collision of wave fronts can be observed for higher frequencies. Also, the wave reflection on the walls can be treated as wave collision with itself. The non-linearity seems to be weak in our study so the delay in the wave propagation before and after the collision is small. Time-space plots show localized propagating waves with high amplitudes for frequencies near resonance. Between the peaks low amplitude and harmonic patterns are observed. However, for higher frequencies, the frequency band for localized waves becomes wider. In the Fourier space-time plane, this can be observed as a point for the harmonic patterns or a superposition of two lines: one line parallel to wave-vector k axis corresponding to the excitation frequency and a second line with inclination given by wave propagation velocity . For planned future work, this result will help us to reconstruct the whole water surface elevation using time-series from only a few measurement points}, language = {en} } @misc{LabarbeLeGalHarlanderetal., author = {Labarbe, Joris and Le Gal, Patrice and Harlander, Uwe and Le Diz{\`e}s, St{\´e}phane and Favier, Benjamin}, title = {Localized layers of turbulence in stratified horizontally sheared Poiseuille flow}, series = {Fluid Dynamics}, journal = {Fluid Dynamics}, pages = {20}, language = {en} } @misc{HarlanderSukhanovskiiAbideetal., author = {Harlander, Uwe and Sukhanovskii, Andrei and Abide, St{\´e}phane and Borcia, Ion-Dan and Popova, Elene and Rodda, Costanza and Vasiliev, Andrei and Vincze, Miklos}, title = {New Laboratory Experiments to Study the Large-Scale Circulation and Climate Dynamics}, series = {Atmosphere}, volume = {14}, journal = {Atmosphere}, number = {5}, doi = {10.3390/atmos14050836}, pages = {19}, abstract = {The large-scale flows of the oceans and the atmosphere are driven by a non-uniform surface heating over latitude, and rotation. For many years scientists try to understand these flows by doing laboratory experiments. In the present paper we discuss two rather new laboratory experiments designed to study certain aspects of the atmospheric circulation. One of the experiments, the differentially heated rotating annulus at the Brandenburg University of Technology (BTU) Cottbus, has a cooled inner cylinder and a heated outer wall. However, the structure of the atmospheric meridional circulation motivates a variation of this "classical" design. In the second experiment described, operational at the Institute of Continuous Media Mechanics (ICMM) in Perm, heating and cooling is performed at different vertical levels that resembles more the atmospheric situation. Recent results of both experiments are presented and discussed. Differences and consistencies are highlighted. Though many issues are still open we conclude that both setups have their merits. The variation with heating and cooling at different levels might be more suited to study processes in the transition zone between pure rotating convection and the zone of westerly winds. On the other hand, the simpler boundary conditions of the BTU experiment make this experiment easier to control.}, language = {en} } @misc{MalteseMelettideOliveiraAbideViazzoetal., author = {Maltese Meletti de Oliveira, Gabriel and Abide, St{\´e}phane and Viazzo, Stephane and Harlander, Uwe}, title = {A parameter study of strato-rotational low-frequency modulations: impacts on momentum transfer and energy distribution}, 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.2022.0297}, language = {en} }