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Localized Waves without the Existence of Extended Waves: Oscillatory Convection of Binary Mixtures with Strong Soret Effect

D. Jung and M. Lücke
Phys. Rev. Lett. 89, 054502 – Published 16 July 2002
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Abstract

Spatially confined solutions of traveling convection rolls are determined numerically for binary mixtures such as ethanol-water. The appropriate field equations are solved in a vertical cross section of the rolls perpendicular to their axes subject to realistic horizontal boundary conditions. The localized convective states are stably and robustly sustained by strongly nonlinear mixing and complex flow-induced concentration redistribution. We elucidate how this enables their existence for strongly negative separation ratios at small subcritical heating rates below the saddle node of extended traveling convection rolls where the quiescent fluid is strongly stable.

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  • Received 24 January 2002

DOI:https://doi.org/10.1103/PhysRevLett.89.054502

©2002 American Physical Society

Authors & Affiliations

D. Jung and M. Lücke

  • Institut für Theoretische Physik, Universität des Saarlandes, Postfach 151150, D-66041 Saarbrücken, Germany

See Also

Smoothing Out Wake Turbulence

JR Minkel
Phys. Rev. Focus 9, 5 (2002)

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Vol. 89, Iss. 5 — 29 July 2002

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