solid conduction problem bc's

March 1, 2009, 09:58

Hi everybody,

I'm solving a pure solid conduction 3D problem. In 2D I've learned that one should make the surface between 2 different materials as interior, however for some reason in 3D this does not work, as Fluent states that there's "only one adjacent cell thread". Does anybody have a solution for this? I don't want wall bc's because I want Fluent to calculate the temperature itself (the outside faces of the model have wall bc's). Thanks in advance.

March 1, 2009, 10:53

Hi!

see:

http://www.cfd-online.com/Forum/fluent.cgi?read=64246

Ralf

March 1, 2009, 11:42

Thanks Ralf! However, does patching imply that other boundary conditions will be overruled?

March 2, 2009, 07:49

Hi!

the BC at the boundaries to the solid are as they were.

I don't know about the BCs of the solid itself... I guess, they will be conserved - as long as it is not a fixed temperature BC

Ralf

March 2, 2009, 16:28

ah it was a fixed temperature BC however I solved the problem already, I seperated all necessary faces and remeshed, this way I can set the walls to interior... hard work but it paid off tnx anyway

March 1, 2009, 09:58	solid conduction problem bc's	#1
phiz Guest Posts: n/a	Hi everybody, I'm solving a pure solid conduction 3D problem. In 2D I've learned that one should make the surface between 2 different materials as interior, however for some reason in 3D this does not work, as Fluent states that there's "only one adjacent cell thread". Does anybody have a solution for this? I don't want wall bc's because I want Fluent to calculate the temperature itself (the outside faces of the model have wall bc's). Thanks in advance.

March 1, 2009, 10:53	Re: solid conduction problem bc's	#2
Ralf Schmidt Guest Posts: n/a	Hi! see: http://www.cfd-online.com/Forum/fluent.cgi?read=64246 Ralf

March 1, 2009, 11:42	Re: solid conduction problem bc's	#3
phiz Guest Posts: n/a	Thanks Ralf! However, does patching imply that other boundary conditions will be overruled?

March 2, 2009, 07:49	Re: solid conduction problem bc's	#4
Ralf Schmidt Guest Posts: n/a	Hi! the BC at the boundaries to the solid are as they were. I don't know about the BCs of the solid itself... I guess, they will be conserved - as long as it is not a fixed temperature BC Ralf

March 2, 2009, 16:28	Re: solid conduction problem bc's	#5
phiz Guest Posts: n/a	ah it was a fixed temperature BC however I solved the problem already, I seperated all necessary faces and remeshed, this way I can set the walls to interior... hard work but it paid off tnx anyway

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