The Effect of Curvature on Heat or Mass Transfer from an Isothermal Sphere

[+] Author and Article Information
R. G. Watts

Department of Mechanical Engineering, Tulane University, New Orleans, La.

J. Heat Transfer 94(1), 1-6 (Feb 01, 1972) (6 pages) doi:10.1115/1.3449864 History: Received July 20, 1970; Online August 11, 2010


Heat or mass transfer from a sphere to a moving fluid at moderate Reynolds and Peclet numbers is governed by an equation of the form

Nu or Sh = C1Pen + C2
All of the parameters C1 , C2 , and n are functions of the Prandtl number. For the constant-properties case the ranges of the parameters are given in Table 1. The parameter C2 is not necessarily 2 as is sometimes assumed since the equation cannot be used when Pe → 0. C2 is shown to be a first-order correction term resulting from the approximate solution of the energy equation including curvature by a perturbation technique.

Copyright © 1972 by ASME
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