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Numerical investigations of heat transfer mechanisms in the forced laminar wall jet

Published online by Cambridge University Press:  24 August 2001

JÜRGEN SEIDEL  and
HERMANN F. FASEL
JÜRGEN SEIDEL
Affiliation:
Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, AZ 85721, USA
HERMANN F. FASEL
Affiliation:
Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, AZ 85721, USA
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Abstract

The effect of high-amplitude forcing on a laminar wall jet over a heated flat plate is analysed. Highly accurate direct numerical simulations (DNS) are used to investigate the dominant transport mechanisms. When forcing is applied, the skin friction is reduced markedly and the wall heat transfer is increased. Detailed examination of the unsteady flow field showed that the concepts of eddy viscosity and eddy thermal diffusivity, usually applied to turbulent flows, can be applied to the analysis of unsteady laminar flows to explain the effect of highly unsteady phenomena.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 442 , 10 September 2001 , pp. 191 - 215
Copyright
© 2001 Cambridge University Press

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