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FINITE ELEMENT MODELLING OF INCOMPRESSIBLE THERMO-CONVECTIVE FLOWS

DOI: 10.1615/ICHMT.1996.TransientConvHeatTransf.240

Patricia Arlabosse
Université de Toulouse, Mines Albi, CNRS, Centre RAPSODEE, Campus Jarlard, F-81013 Albi, France

Marc Medale
Aix Marseille Universite, CNRS, IUSTI, Marseille, France

M. Jaeger
IUSTI, University of Provence, 13397 Marseille Cedex 20, France

R. Martin
Institut Universitaire des Systemes Thermiques Industriels URA C.N.R.S. 1168 Avenue Escadrille Normandie Niemen 13397 Marseille Cedex 13, France

Sinopsis

Thermocapillary flow induced by a gas bubble in a silicone oil layer submitted to a vertical temperature gradient is investigated numerically. A bidimensional model based on finite element method has been developped. It enables simulations of laminar flows induced by a surface tension gradient. Different configurations are selected: Marangoni convection acting alone, natural convection type Rayleigh Benard, Marangoni convection acting against gravity... The velocity and temperature fields are computed in a vertical cross section. The combined effects of gravity and thermocapillarity are studied. Numerical results are compared with experimental measurements obtained in a previous experiment.

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