two phase flow in solidworks

Xinmiao:

Flow does not support two phase flow.  My best suggestion is to model the air as particles.  I have done this specifically using small spheres which I gave teh attribute of polystyrene foam, or any other user defined solid that would have a density much less than water. 

This will not compute any interaction that may exist in an actual water/air flow, because the particle calculation is done after the fluid flow is solved.  But I think it works very well if you are investigating water/air separation.

Like Daniel said, no 2 phase flow in flow simulation. But can you describe your application? There might be some things it can do.