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Reynolds stress calculations of homogeneous turbulent shear flow with bounded energy statesReynolds stress calculations of homogeneous turbulent shear flow are conducted with a second-order closure model modified to account for nonequilibrium vortex stretching in the dissipation rate transport equation as recently proposed by Bernard and Speziale (1992). As with the earlier reported K-epsilon model calculations incorporating this vortex stretching effect, a production-equals-dissipation equilibrium is obtained with bounded turbulent kinetic energy and dissipation. However, this equilibrium is now not achieved until the dimensionless time St greater than 60 - an elapsed time that is at least twice as large as any of those considered in previous numerical and physical experiments on homogeneous shear flow. Direct quantitative comparisons between the model predictions and the results of experiments are quite favorable. In particular, it is shown that the inclusion of this nonequilibrium vortex stretching effect has the capability of explaining the significant range of production to dissipation ratios observed in experiments.
Document ID
19930071113
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Speziale, Charles G.
(ICASE; NASA, Langley Research Center Hampton, VA, United States)
Abid, R.
(High Technology Corp.; NASA, Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: International Journal of Non-Linear Mechanics
Volume: 28
Issue: 4
ISSN: 0020-7462
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
93A55110
Funding Number(s)
CONTRACT_GRANT: NAS1-19480
CONTRACT_GRANT: NAS1-18605
Distribution Limits
Public
Copyright
Other

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