[mesh manipulation] How to remove boundary

endron · September 6, 2020, 11:52

Hello everyone,

I couldn't find any compelling and easy step by step explanation for my issue.

I have imported .msh mesh into OpenFoam using fluent3DMeshToFoam. Everything went fine but I have an unwanted wall boundary condition inside my domain which I want to delete or make it so it is 'invisible' for the flow.

In Fluent I would just change the boundary type from 'wall' to 'internal' but I can't figure out how to deal with this problem in OpenFoam.

Help would be much appreciated, thanks in advance.

simrego · September 8, 2020, 07:14

Hi!

If it is a baffle so the faces are sharing the same points, you can use the mergeOrSplitBaffles (https://develop.openfoam.com/Develop...litBafflesDict) utility, if not, you can try the stitchMesh (https://develop.openfoam.com/Develop...stitchMeshDict) utility which will "stitch" the two side and your internal wall will "wanish".
You can find some examples for them in the tutorials.

September 6, 2020, 11:52	How to remove boundary	#1
endron New Member Join Date: Sep 2020 Posts: 3 Rep Power: 6	Hello everyone, I couldn't find any compelling and easy step by step explanation for my issue. I have imported .msh mesh into OpenFoam using fluent3DMeshToFoam. Everything went fine but I have an unwanted wall boundary condition inside my domain which I want to delete or make it so it is 'invisible' for the flow. In Fluent I would just change the boundary type from 'wall' to 'internal' but I can't figure out how to deal with this problem in OpenFoam. Help would be much appreciated, thanks in advance.

September 8, 2020, 07:14		#2
simrego Senior Member anonymous Join Date: Jan 2016 Posts: 416 Rep Power: 14	Hi! If it is a baffle so the faces are sharing the same points, you can use the mergeOrSplitBaffles (https://develop.openfoam.com/Develop...litBafflesDict) utility, if not, you can try the stitchMesh (https://develop.openfoam.com/Develop...stitchMeshDict) utility which will "stitch" the two side and your internal wall will "wanish". You can find some examples for them in the tutorials. endron likes this.

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