Email this article Optimal disturbances of stably stratified turbulent Couette flow
- Authors: Glazunov A.V.1, Zasko G.V.2, Mortikov E.V.3, Nechepurenko Y.M.1
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Affiliations:
- Marchuk Institute of Numerical Mathematics of the Russian Academy of Sciences
- Institute for Applied Mathematics of the Russian Academy of Sciences
- Research Computing Center of the Lomonosov Moscow State University
- Issue: Vol 487, No 3 (2019)
- Pages: 257-261
- Section: Mechanics
- URL: https://journals.eco-vector.com/0869-5652/article/view/15695
- DOI: https://doi.org/10.31857/S0869-56524873257-261
- ID: 15695
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Abstract
Direct numerical simulation data of a stably stratified turbulent Couette flow contains two types of organized structures: the rolls that arise at neutral and close to neutral stratification, and the layered structures, which manifest themselves as the static stability increases. It is shown that both types of structures have spatial scales and forms that coincide with the scales and forms of the corresponding optimal disturbances of the simplified linear model of the Couette flow with the same Richardson numbers.
About the authors
A. V. Glazunov
Marchuk Institute of Numerical Mathematics of the Russian Academy of Sciences
Author for correspondence.
Email: and.glas@gmail.com
Russian Federation, 8, Gubkina street, Moscow, 119991
G. V. Zasko
Institute for Applied Mathematics of the Russian Academy of Sciences
Email: zasko.gr@bk.ru
Russian Federation, 4, Miusskaya square, Moscow, 125047
E. V. Mortikov
Research Computing Center of the Lomonosov Moscow State University
Email: and.glas@gmail.com
Russian Federation, 4/1, Leninskie gory, Moscow, 119234
Y. M. Nechepurenko
Marchuk Institute of Numerical Mathematics of the Russian Academy of Sciences
Email: and.glas@gmail.com
Russian Federation, 8, Gubkina street, Moscow, 119991
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