Abstract

A white-light speckle technique for measurement of flow velocities is described. The speckle patterns are formed by incoherent light at the image plane of the fluid illuminated section. The convection flow generated in a rectangular cell filled with silicone oil is studied with this technique. The flow velocities are obtained as the result of a point-by-point analysis. Alternatively, an overall picture of their spatial distribution is obtained by means of a whole-field filtering technique. The accuracy of the two methods of analysis is studied.

© 1982 Optical Society of America

Flow visualization of Bénard convection using holographic interferometry

Masahiro Ueda, Kiichiro Kagawa, Koichi Yamada, Chiyozo Yamaguchi, and Yoshifumi Harada
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Instantaneous velocity field measurements in unsteady gas flow by speckle velocimetry

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Velocity measurements in a convective flow by holographic interferometry

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