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Boundary condition for solid body with multiple material properties

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I'm modeling a fluid-structure interation between a square channel flow and a solid body with two different properties. The solid body have two domains which allows me to assign those properties. However im running into "undefined value found in the equation residual vector" error, which means my boundary condition was not set correctly. I ran the same simulation for the solidbody with only one properties (hence only one domain), the simulation works fine. So im fairly certain that the problem has something to do with the interaction between two domains.

I've tried to add "rigid connector" or "attachment" to the surface between those two domains, neither was working. Please advise.....



0 Replies Last Post Jul 3, 2022, 1:10 a.m. EDT
COMSOL Moderator

Hello Jack Wen

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