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CONV-09. Proceedings of International Symposium on Convective Heat and Mass Transfer in Sustainable Energy
April 26 - May 1, 2009, Hammamet, Tunisia

DOI: 10.1615/ICHMT.2009.CONV


ISBN Print: 978-1-56700-261-4

ISSN Online: 2642-3499

ISSN Flash Drive: 2642-3502

THERMODIFFUSION IN CAVITY FILLED WITH A BINARY MIXTURE

page 9
DOI: 10.1615/ICHMT.2009.CONV.770
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ABSTRACT

In this paper, the onset of thermo-solutal convection in a liquid layer overlying a porous layer has been studied, where the whole system being laterally heated. The non-linear two-dimensional Navier Stokes equations, the energy equation, continuity equation, and the mass balance equation are solved for the liquid layer. The modified Brinkman model is taken into consideration for the porous layer. The partial differential equations are solved numerically using the finite element technique. The thermo-solutal convection in the presence of thermodiffusion or Soret effect is studied in details. Three different cases will be investigated, case 1 the system is a porous cavity filled with liquid, case 2 the system is a non porous cavity and thirdly the system is a liquid layer overlying a porous layer. It is shown that at low gravity, separation occurs in the absence of buoyancy. In the presence of buoyancy, mixing occurs into the cavity and no separation exists.

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