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Reynolds-stress and dissipation-rate budgets in a turbulent channel flow

Published online by Cambridge University Press:  21 April 2006

N. N. Mansour ,
J. Kim  and
P. Moin
N. N. Mansour
Affiliation:
NASA Ames Research Center, Moffett Field, CA 94035, USA
J. Kim
Affiliation:
NASA Ames Research Center, Moffett Field, CA 94035, USA
P. Moin
Affiliation:
NASA Ames Research Center, Moffett Field, CA 94035, USA
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Abstract

The Budgets For The Reynolds Stresses And For The Dissipation Rate Of The Turbulence Kinetic Energy Are Computed Using Direct Simulation Data Of A Turbulent Channel Flow. The Budget Data Reveal That All The Terms In The Budget Become Important Close To The Wall. For Inhomogeneous Pressure Boundary Conditions, The Pressure—Strain Term Is Split Into A Return Term, A Rapid Term And A Stokes Term. The Stokes Term Is Important Close To The Wall. The Rapid And Return Terms Play Different Roles Depending On The Component Of The Term. A Split Of The Velocity Pressure-Gradient Term Into A Redistributive Term And A Diffusion Term Is Proposed, Which Should Be Simpler To Model. The Budget Data Are Used To Test Existing Closure Models For The Pressure—Strain Term, The Dissipation Rate, And The Transport Rate. In General, Further Work Is Needed To Improve the models.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 194 , September 1988 , pp. 15 - 44
Copyright
© 1988 Cambridge University Press

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