Influence of vertical vibrations on the separation of a binary mixture in a horizontal porous layer heated from below

被引：24

作者：

Elhajjar, Bilal ^{[1
]}

Mojtabi, Abdelkader ^{[1
]}

Charrier-Mojtab, Marie-Catherine ^{[2
]}

机构：

[1] Univ Toulouse 3, CNRS,UFR MIG, INP,UPS, IMFT,UMR 5502, F-31062 Toulouse, France

[2] Univ Toulouse 3, PHASE,EA810, UFR PCA, F-31062 Toulouse, France

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2009年 / 52卷 / 1-2期

关键词：

Porous media; Binary mixture; Soret effect; Thermogravitation; Thermo vibration; Linear stability; CONVECTIVE INSTABILITY;

D O I：

10.1016/j.ijheatmasstransfer.2008.05.033

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

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 psi > psi(mono) > 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 analysis of the averaged governing equations show that the vertical vibrations delay the transition from monocellular flow to multicellular now. The vibrations also decrease the value of psi(mono), which allows species separation for a wide variety of binary Mixtures. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：165 / 172

页数：8

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