Walaa Elhamamy

Thanks for your reply, I will try the technique you mentioned, and I hope it will work for me.

I am trying to simulate a water flood, which enters from Inlet 1, and then will go through the building and inlet2 and 3 as well. I want to see the water volume fraction and the velocities according to this flood. All these drawings in the photo are the walls of the building, and inlets 1, 2, and 3 are doors.

Do you have any suggestions for me?

Many thanks to you.