NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Structure of turbulence at high shear rateThe structure of homogeneous turbulence subject to high shear rate has been investigated by using three-dimensional, time-dependent numerical simulations of the Navier-Stokes equations. This study indicates that high shear rate alone is sufficient for generation of the streaky structures, and that the presence of a solid boundary is not necessary. Evolution of the statistical correlations is examined to determine the effect of high shear rate on the development of anisotropy in turbulence. It is shown that the streamwise fluctuating motions are enhanced so profoundly that a highly anisotropic turbulence state with a 'one-component' velocity field and 'two-component' vorticity field develops asymptotically as total shear increases. Because of high-shear rate, rapid distortion theory predicts remarkably well the anisotropic behavior of the structural quantities.
Document ID
19900055588
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lee, Moon Joo
(NASA Ames Research Center Moffett Field, CA, United States)
Kim, John
(NASA Ames Research Center Moffett Field, CA, United States)
Moin, Parviz
(NASA Ames Research Center Moffett Field; Stanford University, CA, United States)
Date Acquired
August 14, 2013
Publication Date
July 1, 1990
Publication Information
Publication: Journal of Fluid Mechanics
Volume: 216
ISSN: 0022-1120
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
90A42643
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available