How to change between wall and fluid

MTpo · February 28, 2021, 11:00

Hi all,

I have a fairly simple question but can't seem to find the answer. I have a mesh where I have quite a few different baffle domains and want to be able to change these faces from being a wall boundary condition to just being fluid (allowing fluid to flow through it) between different simulations. I imported this mesh from Pointwise where I had set the boundary conditions for these faces as 'unspecified' which I believed would mean fluid could flow through them yet they all got updated to a wall boundary condition. I can't seem to find a way to change these faces to allow fluid to flow through them. Is there a way in Fluent that you can change a face's boundary condition so that it doesn't act like a wall and acts like normal fluid cells allowing the flow to continue through it?

Thank you very much.

MKuhn · March 1, 2021, 09:29

Just change the boundary type in Fluent from wall to internal. This works only if you have a wall and wall-shadow pair, otherwise the mesh is not properly connected at this location.

February 28, 2021, 11:00	How to change between wall and fluid	#1
MTpo New Member Join Date: Feb 2021 Posts: 3 Rep Power: 5	Hi all, I have a fairly simple question but can't seem to find the answer. I have a mesh where I have quite a few different baffle domains and want to be able to change these faces from being a wall boundary condition to just being fluid (allowing fluid to flow through it) between different simulations. I imported this mesh from Pointwise where I had set the boundary conditions for these faces as 'unspecified' which I believed would mean fluid could flow through them yet they all got updated to a wall boundary condition. I can't seem to find a way to change these faces to allow fluid to flow through them. Is there a way in Fluent that you can change a face's boundary condition so that it doesn't act like a wall and acts like normal fluid cells allowing the flow to continue through it? Thank you very much.

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March 1, 2021, 09:29		#2
MKuhn Senior Member Moritz Kuhn Join Date: Apr 2010 Location: Germany, Dresden Posts: 207 Rep Power: 17	Just change the boundary type in Fluent from wall to internal. This works only if you have a wall and wall-shadow pair, otherwise the mesh is not properly connected at this location.