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Onset of Rayleigh-Bénard convection in binary liquid mixtures of 3He in 4He

Published online by Cambridge University Press:  20 April 2006

G. W. T. Lee ,
P. Lucas  and
A. Tyler
G. W. T. Lee
Affiliation:
Schuster Laboratory, Department of Physics, University of Manchester, Manchester M13 9PL Present address: VG Analytical Ltd, Altrincham, Cheshire WA14 5REZ.
P. Lucas
Affiliation:
Schuster Laboratory, Department of Physics, University of Manchester, Manchester M13 9PL
A. Tyler
Affiliation:
Schuster Laboratory, Department of Physics, University of Manchester, Manchester M13 9PL
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Abstract

We describe experiments in which we have observed the onset of Rayleigh-Bénard convection in normal liquid 3He–4He mixtures. Evidence of overstability was seen when heating from below but only stationary convection was observed when heating from above. Measurements of the critical Rayleigh number are presented and compared with the predictions of current theories of marginal stability in a binary mixture. These experiments exemplify liquid 3He–4He mixtures as a system for the study of convective instabilities.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 135 , October 1983 , pp. 235 - 259
Copyright
© 1983 Cambridge University Press

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