Benard-Marangoni Convection in Two Layered Liquids

Details Benard-Marangoni Convection in Two Layered Liquids Benard-Marangoni Convection in Two Layered Liquids

1998-06-30

arxiv.org/abs/patt-sol/9807001v1

Nonlinear Sciences

Chaotic Dynamics

5 pages, 2 column, 3 eps figures, one large. See also http://mobydick.physics.utoronto.ca

Scientific paper

We describe experiments on B{\'e}nard-Marangoni convection in horizontal layers of two immiscible liquids. Unlike previous experiments, which used gases as the upper fluid, we find a square planform close to onset which undergoes a secondary bifurcation to rolls at higher temperature differences. The scale of the convection pattern is that of the thinner lower fluid layer for which buoyancy and surface tension forces are comparable. The wavenumber of the pattern near onset agrees with the prediction of the linear stability analysis for the full two-layer problem. The square planform is in qualitative agreement with recent one- and two-layer nonlinear theories, which fail however to predict the transition to rolls.

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