I used two sets of boundary condition for one target model. I want to compare results from both cases by difference in value cell by cell. Does anyone know how to do that? Thank you in advance.

I guess, you have 2 pst-files and 2 mdl-files with an identical mesh. You can use something like this in Prostar in either one of your mdl-files:

load case_1.pst oper getc vmag 1 load case_2.pst oper getc vmag 2

oper subt 1 2 4 Now you have the difference in velocity magnitude between the two cases in your post register 4 which can be contour plotted in Prostar.

It works the same way with the other variables. Just make sure you have the same cell numbering in your mdl-files.

If you dont know operate just read the help.

Cheers , Andreas

Thank you Andreas for your help. It is just what I need.