Once I create a flow region for my model by adding an external volume and then subtracting the body out of it, I proceed to simulation. But the flow region disappears, and I can’t use it for setting the material or boundary conditions. I am using the zipped file of an assembly. The process works for a single part file, however it’s troubling with the assembly.
Hey @farazalam2004 ,
Once you create an external flow region, you don’t need to subtract the original body again, the flow region should already be created around the body and not through it. You can simply delete the original CAD solids from the model.
To create a flow volume for an entire assembly, did you try creating multiple flow volumes for each part and then using Boolean union to combine all flow regions into one volume OR use Boolean to combine the assembly into one solid part and then create the flow region on that part.
Let us know how it goes!
Best,
Satvik
Well, if I don’t subtract the body, the program asks to add materials to the body entities before starting the mesh generation and states the boundary conditions as invalid.
@farazalam2004 Exactly, if you simply delete those additional bodies - it will not ask you to add material at all. It’s because they exist and are not assigned a material, that’s causing the issue.