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Modeling the dissipation rate in rotating turbulent flowsA variety of modifications to the modeled dissipation rate transport equation that have been proposed during the past two decades to account for rotational strains are examined. The models are subjected to two crucial test cases: the decay of isotropic turbulence in a rotating frame and homogeneous shear flow in a rotating frame. It is demonstrated that these modifications do not yield substantially improved predictions for these two test cases and in many instances give rise to unphysical behavior. An alternative proposal, based on the use of the tensor dissipation rate, is made for the development of improved models.
Document ID
19910006993
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Speziale, Charles G.
(NASA Langley Research Center Hampton, VA., United States)
Raj, Rishi
(City Coll. of the City Univ. of New York NY., United States)
Gatski, Thomas B.
(NASA Langley Research Center Hampton, VA., United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1990
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
ICASE-90-88
NASA-CR-187485
NAS 1.26:187485
AD-A232079
Accession Number
91N16306
Funding Number(s)
CONTRACT_GRANT: NAS1-18605
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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