10.1017/s0022112067001028
Crossref journal-article
Cambridge University Press (CUP)
Journal of Fluid Mechanics (56)
Abstract

The onset of convection induced by thermal and solute concentration gradients, in a horizontal layer of a viscous fluid, is studied by means of linear stability analysis. A Fourier series method is used to obtain the eigenvalue equation, which involves a thermal Rayleigh numberRand an analogous solute Rayleigh numberS, for a general set of boundary conditions. Numerical solutions are obtained for selected cases. Both oscillatory and monotonic instability are considered, but only the latter is treated in detail. The former can occur when a strongly stabilizing solvent gradient is opposed by a destablizing thermal gradient. When the same boundary equations are required to be satisfied by the temperature and concentration perturbations, the monotonic stability boundary curve in the (R, S)-plane is a straight line. Otherwise this curve is concave towards the origin. For certain combinations of boundary conditions the critical value ofRdoes not depend onS(for some range ofS) or vice versa. This situation pertains when the critical horizontal wave-number is zero.A general discussion of the possibility and significance of convection at ‘zero’ wave-number (single convection cell) is presented in an appendix.

Bibliography

Nield, D. A. (1967). The thermohaline Rayleigh-Jeffreys problem. Journal of Fluid Mechanics, 29(3), 545–558.

Authors 1
  1. D. A. Nield (first)
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Dates
Type When
Created 19 years, 4 months ago (March 28, 2006, 8:22 a.m.)
Deposited 6 years, 4 months ago (April 17, 2019, 1:16 p.m.)
Indexed 3 weeks ago (Aug. 6, 2025, 9:13 a.m.)
Issued 57 years, 11 months ago (Sept. 6, 1967)
Published 57 years, 11 months ago (Sept. 6, 1967)
Published Online 19 years, 4 months ago (March 28, 2006)
Published Print 57 years, 11 months ago (Sept. 6, 1967)
Funders 0

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@article{Nield_1967, title={The thermohaline Rayleigh-Jeffreys problem}, volume={29}, ISSN={1469-7645}, url={http://dx.doi.org/10.1017/s0022112067001028}, DOI={10.1017/s0022112067001028}, number={3}, journal={Journal of Fluid Mechanics}, publisher={Cambridge University Press (CUP)}, author={Nield, D. A.}, year={1967}, month=sep, pages={545–558} }