NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Toward the large-eddy simulation of compressible turbulent flowsNew subgrid-scale models for the large-eddy simulation of compressible turbulent flows are developed and tested based on the Favre-filtered equations of motion for an ideal gas. A compressible generalization of the linear combination of the Smagorinsky model and scale-similarity model, in terms of Favre-filtered fields, is obtained for the subgrid-scale stress tensor. An analogous thermal linear combination model is also developed for the subgrid-scale heat flux vector. The two dimensionless constants associated with these subgrid-scale models are obtained by correlating with the results of direct numerical simulations of compressible isotropic turbulence performed on a 96 (exp 3) grid using Fourier collocation methods. Extensive comparisons between the direct and modeled subgrid-scale fields are provided in order to validate the models. A large-eddy simulation of the decay of compressible isotropic turbulence (conducted on a coarse 32(exp 3) grid) is shown to yield results that are in excellent agreement with the fine-grid direct simulation. Future applications of these compressible subgrid-scale models to the large-eddy simulation of more complex supersonic flows are discussed briefly.
Document ID
19920059030
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Erlebacher, G.
(NASA Langley Research Center Hampton, VA, United States)
Hussaini, M. Y.
(NASA Langley Research Center Hampton, VA, United States)
Speziale, C. G.
(NASA Langley Research Center; ICASE Hampton, VA, United States)
Zang, T. A.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
May 1, 1992
Publication Information
Publication: Journal of Fluid Mechanics
Volume: 238
ISSN: 0022-1120
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
92A41654
Funding Number(s)
CONTRACT_GRANT: NAS1-18605
Distribution Limits
Public
Copyright
Other

Available Downloads

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