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Low Reynolds number k-epsilon modelling with the aid of direct simulation dataThe constant C sub mu and the near-wall damping function f sub mu in the eddy-viscosity relation of the k-epsilon model are evaluated from direct numerical simulation (DNS) data for developed channel and boundary layer flow at two Reynolds numbers each. Various existing f sub mu model functions are compared with the DNS data, and a new function is fitted to the high-Reynolds-number channel flow data. The epsilon-budget is computed for the fully developed channel flow. The relative magnitude of the terms in the epsilon-equation is analyzed with the aid of scaling arguments, and the parameter governing this magnitude is established. Models for the sum of all source and sink terms in the epsilon-equation are tested against the DNS data, and an improved model is proposed.
Document ID
19930060818
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rodi, W.
(Karlsruhe Univ. Germany)
Mansour, N. N.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 16, 2013
Publication Date
May 1, 1993
Publication Information
Publication: Journal of Fluid Mechanics
ISSN: 0022-1120
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
93A44815
Distribution Limits
Public
Copyright
Other

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