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Error: bc_warnings

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Hello sir,

When i run my acu solve, in the window it says please check bc_warnings. When i checked there were several errors of the type stated below.

From the error i can understand that there is some error in element inside volume_5. but i am not sure what kind of error is this. Can you please help me ...

This is the error:


*** WARNING: Surface 32421 of element BC "wall tri3 Volume_5 tet4" is in the interior

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If these elements in interior are between two solids, then such warnings are not a problem.
AcuSolve requires a BC for all fluid nodes. If these elements are between solid and fluid, make sure that the surface on fluid side is assigned a BC:

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