Abstract
The convective stability thresholds and nonlinear evolution of convective rolls are numerically investigated in a plane horizontal layer of a colloidal suspension with positive separation ratio in the case of no-slip, impermeable horizontal boundaries. The characteristics of the steady and oscillatory patterns are analyzed under heating and gravity stratification. The standing and traveling waves are found as stable solutions within certain domains of parameters (on the plane of the Rayleigh and the Boltzmann numbers). Complex bifurcation and spatiotemporal properties are caused by the interaction of gravity sedimentation, Soret-induced gradients, and convective mixing of the fluid.
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Contribution to the Topical Issue “Thermal nonequilibrium phenomena in multi-component fluids” edited by Fabrizio Croccolo and Henri Bataller.
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Smorodin, B.L., Cherepanov, I.N. Convection of colloidal suspensions stratified by thermodiffusion and gravity. Eur. Phys. J. E 37, 118 (2014). https://doi.org/10.1140/epje/i2014-14118-x
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DOI: https://doi.org/10.1140/epje/i2014-14118-x