Membrane distillation system .. URGENT

ashish

porous hydrophobic membrane which is held between two quadratic channels The liquid feed (water (1)) is circulated through the lower channel and the inert sweep gas nitrogen (2) is circulated through the upper one. The two streams are contacted in a counter flow manner,The volatile component water evaporates, and diffuses through the membrane pores. The inert gas sweeps the water vapor permeating through the membrane carrying them outside the membrane module.

I have to simulate the heat and mass transfer in fluent.... I am new to fluent ... plzzz tell me which model to be used ...