Domain pointer ID for UDF's Get_Domain()
 

Hello

I am creating a UDF to serve as a boundary condition on a wall. I need the argument 'd' to be passed in my UDF. To assign the domain pointer using domain = Get_Domain() command, how do I decide on the domain ID that goes inside the brackets. All the FLUENT examples have that ID as 1. Is this the domain ID of the fluid or the wall,if my BC is for the wall?