Résumé:
The heat and mass transfer by laminar and steady natural convection in two-dimensional horizontal elliptical annular space filled with a fluid-saturated porous medium is analyzed
numerically using our calculation code based on the finite volumes method and under the vorticity-stream function formulation by solving the equations of continuity, momentum, energy
and concentration, using Darcy's law and Boussinesq’s approximation. Both walls bounding the
annular space are maintained at uniform temperatures and concentrations. The flow-related
control parameters are Rayleigh-Darcy number, Lewis number and buoyancy ratio. The
geometrical control parameters are the inclination angle and the eccentricities of the elliptical
cylinders. The heat and mass transfer by natural convection is studied for both cooperating and
opposing buoyancies. The locals and the averaged Nusselt and Sherwood numbers are presented
in term ofthe control parameters.
