VOF model tips desired!
 

Hello everyone!
I need to simulate a two-phase flow of air and water. And the priamry is air, the second water. But after I defined a region that is part of the domain which I set water, the whole domain becomes water. I did it as the video suggested, but I don't know why I couldn't make it!
Thanks in advance!

Try to define the two regions in the mesh

Thanks, this problem had been solved several days ago! I didn't do it exactly as the video!