J. Phys. III France
Volume 6, Numéro 11, November 1996
Page(s) 1527 - 1534
DOI: 10.1051/jp3:1996200
J. Phys. III France 6 (1996) 1527-1534

The Oscillatory 2D Convective States of a Binary Fluid Confined in Small Cavity

E. Delouche, G. Labrosse and E. Tric

CNRS - LIMSI, Université Paris-Sud, 91405 Orsay Cedex, France

(Received 7 May 1996, revised 1 July 1996, accepted 19 September 1996)

2D accurate numerical experiments have been performed with a Boussinesq binary fluid subject to Soret effect and confined in a small (length/height = 2) cavity. The steady convective states observed close to the threshold from conduction to convection, for a separation ratio fixed at -0.2, are not made of standing waves. Rather, they can be seen as made of unbalanced and phase shifted counterpropagating traveling waves. The salient features of these flows are reported, their temporal characteristics in particular.

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