multi phase floww..need help..
 

i m doing aan evaporative cooler in cfd...in which heat and mass exchange takes place between air and water..the temperature of the air decreases and moisturer content in the air increases after the interface..and the temperature decrease depends on the cooling pads..also ad velocity of the air and humidity ratio..
plz help me how totake udfss for this problem.?

i would be very grate ful if u help mee..plzz....