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Published in: Fluid Dynamics 6/2020

01-11-2020

Structure and Dynamics of Large-Scale Circulation in Turbulent Convection at High Prandtl Numbers

Authors: A. Yu. Vasiliev, A. N. Sukhanovskii, P. G. Frick

Published in: Fluid Dynamics | Issue 6/2020

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Abstract

The structure and dynamics of the large-scale circulation in turbulent Rayleigh—Bénard convection in a cubic cell are experimentally investigated for fluids with moderate and high Prandtl numbers (from 3.5 to 64). The decomposition of two-dimensional velocity fields into Fourier modes shows that with variation of the Prandtl number from 3.5 to 24 one large-scale mode predominates in the flow. With further increase in the Prandtl number the flow structure considerably changes and the energy is redistributed between several lower Fourier modes. The temporal dynamics of the predominant mode is also considerably changed.

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Literature
1.
go back to reference V. D. Zimin and P. G. Frick, Turbulent Convection (Nauka, Moscow, 1988) [in Russian]. V. D. Zimin and P. G. Frick, Turbulent Convection (Nauka, Moscow, 1988) [in Russian].
21.
go back to reference L. Zwirner, R. Khalilov, I. Kolesnichenko, A. Mamykin, S. Mandrykin, A. Pavlinov, A. Shestakov, A. Teimurazov, P. Frick, and O. Shishkina, “The influence of the cell inclination on the heat transport and large-scale circulation in liquid metal convection,” J. Fluid Mech. 884, A18 (2020). https://doi.org/10.1017/jfm.2019.935ADSCrossRefMATH L. Zwirner, R. Khalilov, I. Kolesnichenko, A. Mamykin, S. Mandrykin, A. Pavlinov, A. Shestakov, A. Teimurazov, P. Frick, and O. Shishkina, “The influence of the cell inclination on the heat transport and large-scale circulation in liquid metal convection,” J. Fluid Mech. 884, A18 (2020). https://​doi.​org/​10.​1017/​jfm.​2019.​935ADSCrossRefMATH
Metadata
Title
Structure and Dynamics of Large-Scale Circulation in Turbulent Convection at High Prandtl Numbers
Authors
A. Yu. Vasiliev
A. N. Sukhanovskii
P. G. Frick
Publication date
01-11-2020
Publisher
Pleiades Publishing
Published in
Fluid Dynamics / Issue 6/2020
Print ISSN: 0015-4628
Electronic ISSN: 1573-8507
DOI
https://doi.org/10.1134/S0015462820060130

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