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Computation of turbulent boundary layer flows with an algebraic stress turbulence modelAn algebraic stress turbulence model is presented, characterized by the following: (1) the eddy viscosity expression is derived from the Reynolds stress turbulence model; (2) the turbulent kinetic energy dissipation rate equation is improved by including a production range time scale; and (3) the diffusion coefficients for turbulence equations are adjusted so that the kinetic energy profile extends further into the free stream region found in most experimental data. The turbulent flow equations were solved using a finite element method. Examples include: fully developed channel flow, fully developed pipe flow, flat plate boundary layer flow, plane jet exhausting into a moving stream, circular jet exhausting into a moving stream, and wall jet flow. Computational results compare favorably with experimental data for most of the examples considered. Significantly improved results were obtained for the plane jet flow, the circular jet flow, and the wall jet flow; whereas the remainder are comparable to those obtained by finite difference methods using the standard kappa-epsilon turbulence model. The latter seems to be promising with further improvement of the expression for the eddy viscosity coefficient.
Document ID
19870007549
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Kim, Sang-Wook (Universities Space Research Association Columbia, MD, United States)
Chen, Yen-Sen (Universities Space Research Association Columbia, MD, United States)
Date Acquired
September 5, 2013
Publication Date
November 1, 1986
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NASA-CR-178967
NAS 1.26:178967
Accession Number
87N16982
Funding Number(s)
CONTRACT_GRANT: NAS8-35918
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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