DrAmine
Ansys Employee

You need to experiment with the software you are using to get familiar with it :)

 

1/The idea with the Boundary Register is just to create register relative to the wall you want to relate your register to it. So you can give 10 or 20 cells does not play a role. Why?

 

2/Because marking with Cell Wall Distance will mark based on the distance but for all Walls! in All regions!

 

3/So by combining the two in a Fluent Expression: Register-0 and Register-1 using nested IF condition: return 1 if you are in both otherwise zero. Use now that new Expression Variable to create a new register!