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Turbulent flow with heat transfer in plane and curved wall jets

Published online by Cambridge University Press:  20 April 2006

T. Dakos ,
C. A. Verriopoulos  and
M. M. Gibson
T. Dakos
Affiliation:
Fluids Section, Mechanical Engineering Department, Imperial College of Science and Technology, Exhibition Road, London SW7 2BX
C. A. Verriopoulos
Affiliation:
Fluids Section, Mechanical Engineering Department, Imperial College of Science and Technology, Exhibition Road, London SW7 2BX
M. M. Gibson
Affiliation:
Fluids Section, Mechanical Engineering Department, Imperial College of Science and Technology, Exhibition Road, London SW7 2BX
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Abstract

Extensive single-point turbulence measurements made in a heated wall jet on a convex wall, and in an equivalent plane flow, show that the turbulence structure and the transfer of heat and momentum are affected by wall curvature. In the curved wall jet the points of zero shear stress and zero streamwise heat flux are displaced further from the point of maximum velocity, the Stanton number for heat transfer from the surface is reduced more than the skin-friction coefficient, and temperature profiles in the inner layer depart from the flat-flow wall law. The shear stress, turbulent intensities and turbulent heat fluxes are reduced by stabilizing curvature in the inner layer and increased by destabilizing curvature in the outer flow. The largest changes occur in the triple products, which are nearly doubled by destabilizing curvature.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 145 , August 1984 , pp. 339 - 360
Copyright
© 1984 Cambridge University Press

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