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-   -   CHT Boundary Conditions in FLUENT (http://www.cfd-online.com/Forums/fluent/63554-cht-boundary-conditions-fluent.html)

mectsaran April 12, 2009 16:53

CHT Boundary Conditions in FLUENT
 
I am designing a coolant flow inside a solid domain.
I have a rectangular 3d fluid domain inside a solid domain.
I have created the geometry in the GAMBIT and imported the mesh into fluent. It created two walls: one wall and one shadow wall for each of the four faces of the fluid domain.i.e bottom wall, bottom wall shadow, top wall, top wall shadow, left wall, left wall shadow, right wall and right wall shadow. What Bc's I have to define on these walls?

jwillie2000 May 14, 2012 06:13

Question on CHT flow in using Fluent
 
Hi,

I just read your post and wanted to know if we have a good tutorial in Fluent for CHT flow simulations? It would be nice if you can give me some citations. I am looking at cooling and would need to do CHT flow simulations for air through a domain and to look at the heat transfer between the air and solid housing of the machine.

Thanks in advance for ur input.

Jimmy

Daniel Tanner May 14, 2012 06:37

Walls should be walls and shadows should be set to interior (these are the interface elements between different mesh volumes, e.g., prism to tetrahedral). This can be set in the boundary condition panel in fluent.

jwillie2000 May 14, 2012 07:44

Citations of tutorials for CHT flow in Fluent
 
Hi Dan,

And thanks for writing. I wanted citations on good tutorials that handle CHT flow in Fluent? I would be grateful if you can give me some references.

Thanks!

Jimmy

Quote:

Originally Posted by Daniel Tanner (Post 360929)
Walls should be walls and shadows should be set to interior (these are the interface elements between different mesh volumes, e.g., prism to tetrahedral). This can be set in the boundary condition panel in fluent.


delaneyluke May 15, 2012 01:24

You're wrong there Daniel, wall shadows ARE NOT interiors. Fluent creates a shadow to a wall when there is a cell zone on both sides of the wall. Whatever BC u define for the wall should be defined for the shadow.
For CHT, define your wall and shadow as "Coupled walls"

Regards
Luke


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