[beyond]

I have a problem about the graphy post-processing, how can I make the schematic of flow structure like this(attached file)?

[myaccount]

Hi
This is my first question.Iam simulating a flow over solids(squares).For this I created a domain(big rectangle) with solids squares inside.I have subtracted the square faces from the big rectangular face.I see the big surface getting distorted after I subtract one particular square face.I have easily subtracted all other faces. How to slove this?