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Higher order turbulence closure modelsTheoretical models are developed and numerical studies conducted on various types of flows including both elliptic and parabolic. The purpose of this study is to find better higher order closure models for the computations of complex flows. This report summarizes three new achievements: (1) completion of the Reynolds-stress closure by developing a new pressure-strain correlation; (2) development of a parabolic code to compute jets and wakes; and, (3) application to a flow through a 180 deg turnaround duct by adopting a boundary fitted coordinate system. In the above mentioned models near-wall models are developed for pressure-strain correlation and third-moment, and incorporated into the transport equations. This addition improved the results considerably and is recommended for future computations. A new parabolic code to solve shear flows without coordinate tranformations is developed and incorporated in this study. This code uses the structure of the finite volume method to solve the governing equations implicitly. The code was validated with the experimental results available in the literature.
Document ID
19890002632
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Amano, Ryoichi S.
(Wisconsin Univ. Milwaukee, WI, United States)
Chai, John C.
(Wisconsin Univ. Milwaukee, WI, United States)
Chen, Jau-Der
(Wisconsin Univ. Milwaukee, WI, United States)
Date Acquired
September 5, 2013
Publication Date
October 3, 1988
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NASA-CR-183236
NAS 1.26:183236
Accession Number
89N12003
Funding Number(s)
CONTRACT_GRANT: NAG8-617
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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