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Application of the algebraic RNG model for transition simulationThe algebraic form of the RNG model of Yakhot and Orszag (1986) is investigated as a transition model for the Reynolds averaged boundary layer equations. It is found that the cubic equation for the eddy viscosity contains both a jump discontinuity and one spurious root. A yet unpublished transformation to a quartic equation is shown to remove the numerical difficulties associated with the discontinuity, but only at the expense of merging both the physical and spurious root of the cubic. Jumps between the branches of the resulting multiple-valued solution are found to lead to oscillations in flat plate transition calculations. Aside from the oscillations, the transition behavior is qualitatively correct.
Document ID
19910046739
Document Type
Conference Paper
Authors
Lund, Thomas S. (Purdue University West Lafayette, IN, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
FLUID MECHANICS AND HEAT TRANSFER
Meeting Information
Instability and Transition(Hampton, VA)
Funding Number(s)
CONTRACT_GRANT: NAS1-18605
Distribution Limits
Public
Copyright
Other