Boundary Conditions when Using Mirror Mesh

arb93 · June 10, 2015, 14:04

Hey!

I am using the mirrorMesh feature to simulate the geometry for a rotating cylinder in an otherwise stationary fluid.

I created 1/4 of the geometry and mirrored that twice to get what I need. My question is this;

When the mesh is mirrored, are the boundary conditions also mirrored?
If so what boundary condition should I impose at the mirrored surfaces i.e. the patches that the original and the mirrored geometry have in common?

I am looking for something on the lines of "do nothing and treat it like a regular space in the domain"?

Any thoughts?

Thanks!

B_R_Khan · March 17, 2021, 05:17

Hi!

Were you able to find answer for this? Seems like there is not enough information present regarding mirrorMesh. I get two polymesh files when I use mirrorMesh, mesh generation is successful, simulation runs fine but I am not able to view it in paraview. It gives error that points and fields do not match ( points are double of fields because of mirror). I think the simulation it did was for half of the domain and not for mirrored domain.

June 10, 2015, 14:04	Boundary Conditions when Using Mirror Mesh	#1
arb93 New Member Alex Benjamin Join Date: Jun 2015 Posts: 6 Rep Power: 10	Hey! I am using the mirrorMesh feature to simulate the geometry for a rotating cylinder in an otherwise stationary fluid. I created 1/4 of the geometry and mirrored that twice to get what I need. My question is this; When the mesh is mirrored, are the boundary conditions also mirrored? If so what boundary condition should I impose at the mirrored surfaces i.e. the patches that the original and the mirrored geometry have in common? I am looking for something on the lines of "do nothing and treat it like a regular space in the domain"? Any thoughts? Thanks!

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March 17, 2021, 05:17		#2
B_R_Khan Member Bushra Rasheed Join Date: Dec 2020 Posts: 97 Rep Power: 5	Hi! Were you able to find answer for this? Seems like there is not enough information present regarding mirrorMesh. I get two polymesh files when I use mirrorMesh, mesh generation is successful, simulation runs fine but I am not able to view it in paraview. It gives error that points and fields do not match ( points are double of fields because of mirror). I think the simulation it did was for half of the domain and not for mirrored domain.