solid conduction problem bc's

March 1, 2009, 10:58

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, 11:53

Hi!

see:

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

Ralf

March 1, 2009, 12:42

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

March 2, 2009, 08:49

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, 17:28

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, 10:58	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, 11:53	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, 12:42	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, 08:49	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, 17:28	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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
3 solid conduction	star123	FLUENT	0	August 16, 2007 11:22
heat conduction with temperature profile BC's	Arnout	FLUENT	1	April 14, 2006 09:30
Displaying the conduction through a solid	Chris	FLUENT	5	January 21, 2003 04:39
Energy equation and Solid BC's	Ray	FLUENT	1	January 17, 2003 16:04
Conduction in solid	Theju	FLUENT	4	January 5, 2002 04:14