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Turbulence structure at high shear rateThe structure of homogeneous turbulence in the presence of a high shear rate is studied using results obtained from three-dimensional time-dependent numerical simulations of the Navier-Stokes equations on a grid of 512 x 128 x 128 node points. It is shown that high shear rate enhances the streamwise fluctuating motion to such an extent that a highly anisotropic turbulence state with a one-dimensional velocity field and two-dimensional small-scale turbulence develops asymptotically as total shear increases. Instantaneous velocity fields show that high shear rate in homogeneous turbulent shear flow produces structures which are similar to the streaks present in the viscous sublayer of turbulent boundary layers.
Document ID
19880051815
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
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 13, 2013
Publication Date
January 1, 1987
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
88A39042
Distribution Limits
Public
Copyright
Other

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