[stardust]

Greetings!
I'd like to simulate the airflow in the boundary layer of atmosphere and there are some cubes which stand for buildings in my fluid domain.(like this)

I used to use gambit to mesh my model by using “subtract volumes” and then split it to mesh. However, it seems that ICEM doesn't have such function.
In order to complete the mission and solve the problem, I search on Youtube and found this helpful vedio(https://www.youtube.com/watch?v=VTac...MnOy0Pz-9QCAPS).
The blogger creates a block and splits it to many small blocks and then deletes the small block of the cube.
However, this vedio only has one cube, so I can block and delete it easily, what if I had many cubes in fluid domain? Is it right to split to many blocks and delete the cube-blocks one by one, or there are other ways?
Deeply greatful for your help!