Two-phase flow + evaporation
 

Hello

I want to simulate air flow over a small (1X1 m^2) open water reservoir.
The air temperature is 35 C and water temperature is 20 C.
The air approaching the reservoir is humid with relative humidity of 70%.
How do I simulate this problem (change in air temperature, increase in air vapor content) to find the conditions after the air passes over the reservoir?

For starters ,You'd need to setup the domain as one gas fluid as a mixture of water vapor + air ideal gas, another fluid as just the water, and then, a binary fluid mixture made of water and water vapor to capture the evaporation between them by antoine coefficients. There's a tutorial with those evaporation settings i think, but for lagrange-euler fluid. In this case it'd be Euler-Euler where both phases are continuous .

thanks for your reply, i've made the same settings of the domain but i'm having trouble defining the model, do you have a link to that tutorial or is it made by Ansys?

It's the "spray dryer" tutorial that comes with ansys cfx 12.