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Different types of nonlinear convective oscillations in a multilayer system under the joint action of buoyancy and thermocapillary effect

par Simanovskii, Ilya ;Viviani, Antonio;Dubois, Frank ;Legros, Jean Claude
Référence European Physical Journal Special Topics, 192, 1, page (175-184)
Publication Publié, 2011

Article révisé par les pairs

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Résumé :

The nonlinear development of oscillatory instability under the joint action of buoyant and thermocapillary effects in a multilayer system, is investigated. The nonlinear convective regimes are studied by the finite difference method. Two different types of boundary conditions - periodic boundary conditions and rigid heat-insulated lateral walls, are considered. It is found that in the case of periodic boundary conditions, the competition of both mechanisms of instability may lead to the development of specific types of flow: buoyant-thermocapillary traveling wave and pulsating traveling wave. In the case of rigid heat-insulated boundaries, various types of nonlinear flows - symmetric and asymmetric oscillations, have been found. © 2011 EDP Sciences and Springer.