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Experimental studies on the onset of thermohaline convection

Published online by Cambridge University Press:  29 March 2006

Douglas R. Caldwell
Douglas R. Caldwell
Affiliation:
School of Oceanography, Oregon State University, Corvallis, Oregon 97331
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Abstract

Measurements of the heat flux and temperature gradient in a layer of saline solution stably stratified by Soret diffusion and heated from below exhibit the onset of convection by the growth of very small oscillations which eventually trigger finite amplitude convection. The critical Rayleigh numbers and periods of oscillation are consistent with published theoretical calculations. Several non-linear modes are observed, even for the same heat flux, near the point of onset.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 64 , Issue 2 , 19 June 1974 , pp. 347 - 368
Copyright
© 1974 Cambridge University Press

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