Influence of vertical vibrations on the separation of a binary mixture in a horizontal porous layer heated from below
Résumé
We study the influence of vertical high-frequency and small-amplitude vibrations on the separation of a binary mixture saturating a shallow horizontal porous layer heated from below. The monocellular flow obtained for a separation ratio w > wmono > 0 leads to a migration of the species towards the two vertical boundaries of the cell. The 2D direct numerical simulations and the linear stability of the averaged governing equations analysis show that the vertical vibrations delay the transition from monocellular flow to multicellular flow. The vibrations also decrease the value of wmono, which allows species separation for a wide variety of binary mixtures.
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