NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Compressibility Effects on the Growth and Structure of Homogeneous Turbulent Shear FlowCompressibility effects within decaying isotropic turbulence and homogeneous turbulent shear flow have been studied using direct numerical simulation. The objective of this work is to increase our understanding of compressible turbulence and to aid the development of turbulence models for compressible flows. The numerical simulations of compressible isotropic turbulence show that compressibility effects are highly dependent on the initial conditions. The shear flow simulations, on the other hand, show that measures of compressibility evolve to become independent of their initial values and are parameterized by the root mean square Mach number. The growth rate of the turbulence in compressible homogeneous shear flow is reduced compared to that in the incompressible case. The reduced growth rate is the result of an increase in the dissipation rate and energy transfer to internal energy by the pressure-dilatation correlation. Examination of the structure of compressible homogeneous shear flow reveals the presence of eddy shocklets, which are important for the increased dissipation rate of compressible turbulence.
Document ID
20000023155
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Blaisdell, G. A.
(Purdue Univ. West Lafayette, IN United States)
Mansour, N. N.
(NASA Ames Research Center Moffett Field, CA United States)
Reynolds, W. C.
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Journal of Fluid Mechanics
Publisher: Cambridge University Press
Volume: 256
Subject Category
Fluid Mechanics And Thermodynamics
Funding Number(s)
CONTRACT_GRANT: F49620-86-K-0022
Distribution Limits
Public
Copyright
Other

Available Downloads

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