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On the prediction of turbulent secondary flowsThe prediction of turbulent secondary flows, with Reynolds stress models, in circular pipes and non-circular ducts is reviewed. Turbulence-driven secondary flows in straight non-circular ducts are considered along with turbulent secondary flows in pipes and ducts that arise from curvature or a system rotation. The physical mechanisms that generate these different kinds of secondary flows are outlined and the level of turbulence closure required to properly compute each type is discussed in detail. Illustrative computations of a variety of different secondary flows obtained from two-equation turbulence models and second-order closures are provided to amplify these points.
Document ID
19930003529
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Speziale, C. G. (Institute for Computer Applications in Science and Engineering Hampton, VA, United States)
So, R. M. C. (Arizona State Univ. Tempe., United States)
Younis, B. A. (City Univ. London, United Kingdom)
Date Acquired
September 6, 2013
Publication Date
October 1, 1992
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NASA-CR-189722
ICASE-92-57
NAS 1.26:189722
AD-A257276
Accession Number
93N12717
Funding Number(s)
PROJECT: RTOP 505-90-52-01
CONTRACT_GRANT: NAS1-19480
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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