Abstract

We describe an application of the beam-propagation method of Fleck et al. [Appl. Phys. 10, 129–160 (1976)], whereby we consider a laser beam propagating initially parallel to a hot plate subject to jet impingement; we also compute the intensity profile of the beam as it emerges from the boundary layer. A comparison with a calculation based on ray tracing illustrates the significant role of wave effects (as treated by the beam-propagation method) in this case. We describe a method for measuring the rate of heat transfer q˙ in the viscous sublayer that is applicable in the ray-tracing limit but that cannot be utilized here (other than to provide an upper limit to q˙) because of the substantial wave effects.

© 1994 Optical Society of America

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