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On explicit algebraic stress models for complex turbulent flowsExplicit algebraic stress models that are valid for three-dimensional turbulent flows in noninertial frames are systematically derived from a hierarchy of second-order closure models. This represents a generalization of the model derived by Pope who based his analysis on the Launder, Reece, and Rodi model restricted to two-dimensional turbulent flows in an inertial frame. The relationship between the new models and traditional algebraic stress models -- as well as anistropic eddy visosity models -- is theoretically established. The need for regularization is demonstrated in an effort to explain why traditional algebraic stress models have failed in complex flows. It is also shown that these explicit algebraic stress models can shed new light on what second-order closure models predict for the equilibrium states of homogeneous turbulent flows and can serve as a useful alternative in practical computations.
Document ID
19930006292
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Gatski, T. B. (NASA Langley Research Center Hampton, VA, United States)
Speziale, C. G. (Institute for Computer Applications in Science and Engineering Hampton, VA., United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1992
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NASA-CR-189725
ICASE-92-58
AD-A258993
NAS 1.26:189725
Accession Number
93N15481
Funding Number(s)
PROJECT: RTOP 505-90-52-01
CONTRACT_GRANT: NAS1-19480
CONTRACT_GRANT: NAS1-18605
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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