modelling two phase device

Hii,

I have problem modelling a device. The device basically consists of two inlets and two outlet, in which one inlet is for the air, and the other one is for water, and the same is for the outlet.
The main purpose for the device is to check the interaction of both water, and air.
The problem here is that which module is suitable for this simulation. Please I need your help.

Thanks in Advance