Heat Transfer in the Accelerated Fully Rough Turbulent Boundary Layer

[+] Author and Article Information
H. W. Coleman

Mechanical Engineering Department, Mississippi State University, Mississippi State, MS 39762

R. J. Moffat

Mechanical Engineering Department, Stanford University, Stanford, CA 94305

W. M. Kays

School of Engineering, Stanford University, Stanford, CA 94305

J. Heat Transfer 103(1), 153-158 (Feb 01, 1981) (6 pages) doi:10.1115/1.3244411 History: Received December 03, 1979; Online October 20, 2009


Heat transfer behavior of a fully rough turbulent boundary layer subjected to favorable pressure gradients was investigated experimentally using a porous test surface composed of densely packed spheres of uniform size. Stanton numbers and profiles of mean temperature, turbulent Prandtl number, and turbulent heat flux are reported. Three equilibrium acceleration cases (one with blowing) and one non-equilibrium acceleration case were studied. For each acceleration case of this study, Stanton number increased over zero pressure gradient values at the same position or enthalpy thickness. Turbulent Prandtl number was found to be approximately constant at 0.7–0.8 across the layer, and profiles of the non-dimensional turbulent heat flux showed close agreement with those previously reported for both smooth and rough wall zero pressure gradient layers.

Copyright © 1981 by ASME
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