I want set the boundary as a continuity but I don't know how? I know that in Comsol by default the boundaries are define as continuity and it follow this equation: n.j=0 but I want change it to n(j1- j2)=0 (i want the boundary between two domain will be as continuity like n(j1-j2)=0) how I can do this?
Any help would be appreciated.
I'm new to COMSOL but i had the same problem and hopefully this would help. The problem is not in the equation of continuity but in defining the identity pairs.
When you form a union, continuity is defined by default between touching domains. But when you form an assembly, you must add the continuity node in physics/Pairs. When the geometry have two domains with one or more boundaries in contact, a pair is automatically generated with all the contacting boundaries. so you should make sure that each contacting boundaries are in separate identity pairs. Depending on the application, pay attention on what domain's boundaries are the source/destination.
This solved my problem and I hope it would help.
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