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
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.