On the heat and mass transfer analogy for natural convection of non-dilute binary mixtures of ideal gases in cavities

H. Sun (1) , Guy Lauriat (1)

1 MSME - Laboratoire de Modélisation et Simulation Multi Echelle

An extension of a slightly compressible flow model to double-diffusive convection of a binary mixture of ideal gases enclosed in a cavity is presented. The problem formulation is based on a low Mach number approximation and the impermeable surface assumption is not invoked. The main objectives of this paper are the statement of a new problem formulation, and the analysis of some significant results showing the influence of density variations on transient solutions for pure thermal or pure solutal convection. At steady-state, it is shown that the heat and mass transfer analogy may be applied for non-dilute mixtures at parameter ranges larger than those usually considered

Mots clés: Computational fluid mechanics; Thermosolutal convection; Low-Mach number flows

Domaines: Thermique [physics.class-ph]; Thermique [physics.class-ph]

H. Sun, Guy Lauriat. On the heat and mass transfer analogy for natural convection of non-dilute binary mixtures of ideal gases in cavities. Comptes Rendus Mécanique, 2009, 337 (-), pp.141-149. ⟨10.1016/j.crme.2009.04.001⟩. ⟨hal-00750494⟩