TY - GEN A1 - Meletti, Gabriel A1 - Abide, Stéphane A1 - Harlander, Uwe A1 - Raspo, Isabelle A1 - Stéphane Viazzo, Stéphane T1 - On the influence of the heat transfer at the free surface of a thermally driven rotating annulus T2 - Physics of fluids N2 - Experiments on rotating annuli that are differentially heated in the radial direction have largely contributed to a better understanding of baroclinic instabilities. This configuration creates waves at a laboratory scale that are related to atmospheric circulations. Pioneer studies in baroclinic tanks have shown that experiments with low aspect ratios are more suitable to reproduce small-scale inertia gravity waves, but these tanks have a larger free surface, which leads to higher interactions with their surrounding environment. Considering the heat transferred through the free surface, the present work investigates its impacts on the baroclinic instability using direct numerical simulations (DNS). Y1 - 2025 U6 - https://doi.org/10.1063/5.0248712 SN - 1089-7666 VL - 37 SP - 1 EP - 16 PB - AIP Publishing CY - College Park, MD ER - TY - CHAP A1 - Maltese Meletti de Oliveira, Gabriel A1 - Raspo, Isabelle A1 - Seelig, Torsten A1 - Viazzo, Stephane A1 - Randriamampianina, Anthony A1 - Abide, Stéphane A1 - Krebs, Andreas A1 - Harlander, Uwe T1 - On the instability of radially sheared and axially stratified vortex flow T2 - European Geosciences Union, General Assembly 2018, Vienna, Austria Y1 - 2018 UR - https://meetingorganizer.copernicus.org/EGU2018/EGU2018-8703.pdf N1 - EGU2018-8703 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - GEN A1 - Maltese Meletti de Oliveira, Gabriel A1 - Abide, Stéphane A1 - Viazzo, Stephane A1 - Krebs, Andreas A1 - Harlander, Uwe T1 - Experiments and long-term high-performance computations on amplitude modulations of strato-rotational flows T2 - Geophysical & Astrophysical Fluid Dynamics Y1 - 2021 U6 - https://doi.org/10.1080/03091929.2020.1795647 SN - 1029-0419 SN - 0309-1929 VL - 115 IS - 3 SP - 297 EP - 321 ER - TY - GEN A1 - Maltese Meletti de Oliveira, Gabriel A1 - Abide, Stéphane A1 - Viazzo, Stephane A1 - Harlander, Uwe T1 - A parameter study of strato-rotational low-frequency modulations: impacts on momentum transfer and energy distribution T2 - Philosophical transactions of the Royal Society : Series A, Mathematical, physical and engineering sciences Y1 - 2023 U6 - https://doi.org/10.1098/rsta.2022.0297 SN - 1364-503X SN - 1471-2962 VL - 381 IS - 2246 ER - TY - GEN A1 - Harlander, Uwe A1 - Sukhanovskii, Andrei A1 - Abide, Stéphane A1 - Borcia, Ion-Dan A1 - Popova, Elene A1 - Rodda, Costanza A1 - Vasiliev, Andrei A1 - Vincze, Miklos T1 - New Laboratory Experiments to Study the Large-Scale Circulation and Climate Dynamics T2 - Atmosphere N2 - 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. Y1 - 2023 UR - https://www.mdpi.com/2073-4433/14/5/836 U6 - https://doi.org/10.3390/atmos14050836 VL - 14 IS - 5 ER -