Large-scale structures in stratified turbulent Couette flow and optimal disturbances
-
Grigory V. Zasko
,
Andrey V. Glazunov
Abstract
Direct numerical simulation data of a stratified turbulent Couette flow contains two types of organized structures: rolls arising at neutral and close to neutral stratifications, and layered structures which manifest themselves as 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 optimal disturbances of the simplified linear model of the Couette flow with the same Richardson numbers.
Funding: The development and implementation of used algorithms was supported by the Russian Science Foundation (project No. 17–71–20149), direct numerical simulation was supported by the Russian Science Foundation (project No. 17–17–01210) and performed on the equipment of the Center for Collective Use of Ultra-High-Performance Computing Resources of Lomonosov Moscow State University.
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Articles in the same Issue
- Frontmatter
- Modelling of equatorial ionospheric anomaly in the INM RAS coupled thermosphere-ionosphere model
- The study of time dependence of particle flux with multiplication in a random medium
- 2D turbulence closures for the barotropic jet instability simulation
- Large-scale structures in stratified turbulent Couette flow and optimal disturbances
Articles in the same Issue
- Frontmatter
- Modelling of equatorial ionospheric anomaly in the INM RAS coupled thermosphere-ionosphere model
- The study of time dependence of particle flux with multiplication in a random medium
- 2D turbulence closures for the barotropic jet instability simulation
- Large-scale structures in stratified turbulent Couette flow and optimal disturbances
