|
PLASMA, HYDRO- AND GAS DYNAMICS
Two dynamical regimes of coherent columnar vortices in a rotating fluid
D. D. Tumachevab, S. V. Filatovba, S. S. Vergelesac, A. A. Levchenkocab a Landau Institute for Theoretical Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432 Russia
b Osipyan Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432 Russia
c Faculty of Physics, National Research University Higher School of Economics, Moscow, 101000 Russia
Abstract:
Vortex flow generation in an incompressible fluid was investigated experimentally inside a rotating closed cubic aquarium. The flow was excited by producing small-scale eddies near the side edges of the cube. Coherent columnar vortices-cyclones extending from the bottom to the lid of the cube were observed in the liquid volume. The lifetime of the cyclones was much longer than the attenuation time due to the viscous friction on the bottom and the lid. It was found that there are two regimes of quasi-two-dimensional turbulence, which are characterized by different ways of interaction between quasi two-dimensional flow and inertial waves. The radial profiles of the time-averaged azimuth velocity in the coherent vortices in these two regimes are investigated. It is shown that the vortices differ in size and in vorticity distribution along the radius.
Received: 17.07.2023 Revised: 02.08.2023 Accepted: 02.08.2023
Citation:
D. D. Tumachev, S. V. Filatov, S. S. Vergeles, A. A. Levchenko, “Two dynamical regimes of coherent columnar vortices in a rotating fluid”, Pis'ma v Zh. Èksper. Teoret. Fiz., 118:6 (2023), 430–437; JETP Letters, 118:6 (2023), 426–432
Linking options:
https://www.mathnet.ru/eng/jetpl7041 https://www.mathnet.ru/eng/jetpl/v118/i6/p430
|
Statistics & downloads: |
Abstract page: | 60 | References: | 14 | First page: | 5 |
|