A LOCAL THERMAL NONEQUILIBRIUM MODEL FOR COUPLED HEAT AND MASS TRANSFER WITH DISPERSION AND THERMAL DIFFUSION IN POROUS MEDIA

A theoretical model is proposed to predict Darcy-scale mass transport in porous media coupled with nonequilibrium heat transfer and taking into account the thermal diffusion process. volume-averaging technique was used approximations leading a two-equation or two-temperature for macroscale energy balance equations. Because of Soret effect, concentration deviation respect averaged value function temperature gradients fluid phase, gradient solid difference between two temperatures. The mapping deviations averages involves four closure problems equations: were solved numerically over two-dimensional periodic-unit cell evaluation purposes. results show that effective coefficients depend strongly on thermophysical properties medium Peclet number. In particular, effective-Soret coefficient changes number phases' conductivity ratios.