[blockMesh] Make an inlet on a wall but smaller than wall

atokeria · May 28, 2025, 02:20

I have a rectangular domain in blockMesh, and I want to have an inlet. However, my inlet must be smaller than the wall it is on i.e. the inlet is not the entire wall. Imagine it as a window in a house. This is the same case for my outlet. How can I make such a inlet? Do I have to use patches, and if so how do I define the patches?

Yann · May 28, 2025, 04:46

Yes you need to have patches.

You can either create multiple blocks in your blockMesh to have faces corresponding to your inlet and outlet (pretty cumbersome to do), or use topoSet to create faceSet/faceZones, then createPatch to create parches out of it. There might be some tutorials doing this.

May 28, 2025, 02:20	Make an inlet on a wall but smaller than wall	#1
atokeria New Member Ayush Tokeria Join Date: May 2025 Location: US Posts: 13 Rep Power: 2	I have a rectangular domain in blockMesh, and I want to have an inlet. However, my inlet must be smaller than the wall it is on i.e. the inlet is not the entire wall. Imagine it as a window in a house. This is the same case for my outlet. How can I make such a inlet? Do I have to use patches, and if so how do I define the patches?

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May 28, 2025, 04:46		#2
Yann Senior Member Yann Join Date: Apr 2012 Location: France Posts: 1,360 Rep Power: 33	Yes you need to have patches. You can either create multiple blocks in your blockMesh to have faces corresponding to your inlet and outlet (pretty cumbersome to do), or use topoSet to create faceSet/faceZones, then createPatch to create parches out of it. There might be some tutorials doing this.