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Showing papers by "Suhas V. Patankar published in 1991"


Journal ArticleDOI
TL;DR: In this article, an analysis and evaluation of the capability of k-e low-Reynolds number turbulence models to predict transition in external boundary-layer flows subject to free-stream turbulence is presented.
Abstract: An analysis and evaluation of the capability of k –e low-Reynolds-number turbulence models to predict transition in external boundary-layer flows subject to free-stream turbulence is presented. The similarities between the near-wall cross-stream regions in a fully turbulent boundary layer and the progressive stages through which developing boundary layers pass in the streamwise direction are used to describe the mechanisms by which the models simulate the transition process. Two representative models (Jones and Launder, 1972; Lam and Bremhorst, 1981) are employed in a series of computational tests designed to answer some specific practical questions about the ability of these models to yield accurate, reliable answers over a range of free-stream turbulence conditions.

61 citations


Journal ArticleDOI
TL;DR: In this paper, a modification is proposed that limits the production term in the turbulent kinetic energy equation and is based on a simple stability criterion and correlated to the free-stream turbulence level.
Abstract: An approach for improving the prediction of boundary layer transition with k−e type low-Reynolds-number turbulence models is developed and tested. A modification is proposed that limits the production term in the turbulent kinetic energy equation and is based on a simple stability criterion and correlated to the free-stream turbulence level

41 citations