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Instability of thermocapillary–buoyancy convection in shallow layers. Part 1. Characterization of steady and oscillatory instabilities

Published online by Cambridge University Press:  25 March 1998

R. J. RILEY  and
G. P. NEITZEL
R. J. RILEY
Affiliation:
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405, USA Present address: Cabot Corporation, Research and Development, Pampa, TX 79066, USA.
G. P. NEITZEL
Affiliation:
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405, USA
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Abstract

Combined thermocapillary–buoyancy convection in a thin rectangular geometry is investigated experimentally, with an emphasis on the generation of hydrothermal-wave instabilities. For sufficiently thin layers, pure hydrothermal waves are observed, and are found to be oblique as predicted by a previous linear-stability analysis (Smith & Davis 1983). For thicker layers, both a steady multicell state and an oscillatory state are found to exist, but the latter is not in the form of a pure hydrothermal wave.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 359 , 25 March 1998 , pp. 143 - 164
Copyright
© 1998 Cambridge University Press

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