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Rapid calculations for boundary-layer transfer using wedge solutions and asymptotic expansions

Published online by Cambridge University Press:  28 March 2006

H. J. Merk
H. J. Merk
Affiliation:
Koninklijke/Shell-Laboratorium, Amsterdam, Holland
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Abstract

Exact transfer calculations for boundary layers with longitudinal pressure gradients are very complicated, but in the literature several approximate methods are known for the rapid calculation of both the wall friction and the heat transfer. A ‘wedge method’ propounded by Meksyn turns out to be one of the most rapid methods, being no less accurate than other approximate methods. A way of refining this method is proposed.

This paper also shows that asymptotic expansions provide convenient relations which are capable of expressing the Nusselt number explicitly in terms of the Prandtl number.

It is shown that, together with the asymptotic expansions, Meksyn's method permits rapid calculation of local heat transfer numbers. Some examples of application are given for elliptical cylinders and spheres for several values of the Prandtl number.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 5 , Issue 3 , April 1959 , pp. 460 - 480
Copyright
© 1959 Cambridge University Press

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