Abstract
A real-time holographic interferometry is applied to obtain microscopic behaviors of heat and mass transfer in the thin boundary layer along a flat plate in a parallel air stream, in which the physical situation changes instantaneously and spatially. The flat plate is heated or wetted, and is tested in the regimes of laminar and turbulent flows. Interferometric pictures are taken photographically in different exposure times. The obtained results are discussed mainly to find out the dependence of exposure time on free stream velocity and turbulence fluctuation, and to establish practically the optimum expo-sure time with good resolution, under the condition that the temperature and mass concentration gradients change greatly in the thin boundary layer.© (1983) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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