Boundary Conditions for the Turbulent Mixing Layer Between Two Parallel Streams

[+] Author and Article Information
T. E. Unny, Norio Hayakawa

Department of Civil Engineering, University of Waterloo, Waterloo, Ontario, Canada

J. Appl. Mech 41(1), 25-28 (Mar 01, 1974) (4 pages) doi:10.1115/1.3423237 History: Received October 01, 1972; Online July 12, 2010


The boundary conditions of the boundary-layer problem between two parallel turbulent streams are investigated solving higher-order terms of the inner and outer boundary-layer expansion. It is shown that the assumption that the eddy viscosity is proportional to longitudinal distance x fails to yield the third boundary condition of the boundary-layer problem. In this paper this boundary condition has been derived based on the consideration that the eddy viscosity attains a constant value at large but finite distance. The result applies to compressible as well as incompressible flow.

Copyright © 1974 by ASME
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