Suppression of Turbulence by Self-Generated and Imposed Mean Flows

Date

2007

Authors

Shats, Michael
Xia, Hua
Punzmann, Horst
Falkovich, Gregory

Journal Title

Journal ISSN

Volume Title

Publisher

American Physical Society

Abstract

The first direct experimental evidence of the suppression of quasi-two-dimensional turbulence by mean flows is presented. The flow either is induced externally or appears in the process of spectral condensation due to an inverse cascade in bounded turbulence. The observed suppression of large scales is consistent with an expected reduction in the correlation time of turbulent eddies due to shearing. At high flow velocities, sweeping of the forcing-scale vortices reduces the energy input, leading to a reduction in the turbulence level.

Description

Keywords

Keywords: Condensation; Correlation methods; Spectrum analysis; Forcing scale vortices; Mean flows; Quasi two dimensional turbulence; Turbulent eddies; Turbulence

Citation

Source

Physical Review Letters

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1103/PhysRevLett.99.164502

Restricted until

2037-12-31