Publication Date:
1962-03-01
Description:
The convective diffusion of matter from a stationary object to a moving fluid stream is distinct from pure heat transfer because of the appearance of a finite interfacial velocity at the solid surface. This velocity is related to the rate of mass transfer by a dimensionless group B in such a way that for −1 〈 B 〈 0 the transfer is from the bulk to the surface while for 0 〈 B 〈 ∞ the transfer is from the surface to the main stream. In this paper, asymptotic solutions to the two-dimensional laminar boundary-layer equations are developed for the case B 〉 1, and for rather general systems. It is shown that in most instances the asymptotic expressions for the rate of mass transfer become accurate when B 〉 3 and that the transition region between the pure heat-transfer analogy (B ∼ 0) and the B 〉 1 asymptote may be described by a simple graphical interpolation. These results may easily be extended to three-dimensional surfaces of revolution by the usual co-ordinate transformations of boundary-layer theory. © 1962, Cambridge University Press. All rights reserved.
Print ISSN:
0022-1120
Electronic ISSN:
1469-7645
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
