Incompressible simulation in architecture masses

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1

thi is the mass i am trying run cfd for:

but as you can see i recieve similar errors. ( * Please ensure that all CAD entities are assigned a material or advanced concept. Missing material or advanced concepts were detected for the following entities: solid3, solid4

  • Invalid boundary condition: Wall 1 has been assigned to at least one body without a material assignment: solid3, solid4. Please remove this body from the boundary condition assignment.)

I would truly appreciate it if annyone can help me with this problem.
thank you.

2

Hey ellalee17,

Thanks for posting on the forum.

With an incompressible simulation, you need only one solid body representing the flow volume.

It seems like you have 3 solid bodies. You might want to use Boolean operations, etc. to subtract the two inner bodies from the outer solid body to create a single flow region with hollow space that represents the boundaries of the inner bodies.

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Any of these tutorials should be really helpful before getting on with this simulation:

Best,
Satvik