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-   -   [ANSYS Meshing] Mesh for conjugate heat transfer (https://www.cfd-online.com/Forums/ansys-meshing/89709-mesh-conjugate-heat-transfer.html)

hassaan June 20, 2011 15:13

Mesh for conjugate heat transfer
 
I have made a 2D geometry and have meshed it in ANSYS 12.0

When i export the mesh to Fluent, there is no shadow wall at the solid-fluid interface. Hence, i do not get the 'couple' option in wall boundary condition ( as i am supposed to find).

Can anyone tell me the reason why this is so?

thanks in advance!

regards
Hassaan

Moonlight June 21, 2011 03:34

Check īthe connectivity of the faces. If you are a GAMBIT user, the color of the line between two faces should be pink.

PSYMN June 24, 2011 12:58

Multi-body part...
 
I assume you are using ANSYS Meshing in Workbench...

If you have separate parts, it will mesh them one at a time and the edges won't really be connected. You need to combine these into a multi-body part so they will be meshed together...

There are other posts about how to do this, or you could check the help...

hassaan June 26, 2011 01:53

Quote:

Originally Posted by PSYMN (Post 313441)
I assume you are using ANSYS Meshing in Workbench...

If you have separate parts, it will mesh them one at a time and the edges won't really be connected. You need to combine these into a multi-body part so they will be meshed together...

There are other posts about how to do this, or you could check the help...

Yes I am meshing ANSYS workbench and i did sort out the problem :)

But now i cant seem to mesh the tube bundle. A straight pipe without bends is meshed easily but one with bends gives an error. Is there a different method to do this?

Help will be greatly appreciated Thanks! :)

PSYMN June 28, 2011 13:50

Have you specified the mesh method? Perhaps "automatic" won't generate a swept mesh, but specifying swept, along with a source and target surface will do the trick...

Or you could try "MultiZone".

eaxja August 12, 2011 10:10

Quote:

Originally Posted by hassaan (Post 313591)
Yes I am meshing ANSYS workbench and i did sort out the problem :)

But now i cant seem to mesh the tube bundle. A straight pipe without bends is meshed easily but one with bends gives an error. Is there a different method to do this?

Help will be greatly appreciated Thanks! :)

Hi i recently saw ur post on ansys mesher and how u solved the problem such that u get a coupled wall between two interface (eg solid and fluid) i am also using ansys mesher and i would please appreciate it if you could explain to me how you solved it..... Thanks :D

wethiq July 6, 2015 04:13

conjugate heat transfer
 
Hi, I work model contain fluid and solid wall when I run in fluent the heat don't transfer from wall (hot) to fluid (cold) in which I mesh each one separately. what wrong ?

Mohammad Jam December 4, 2016 09:56

Connection between two region
 
Quote:

Originally Posted by wethiq (Post 553948)
Hi, I work model contain fluid and solid wall when I run in fluent the heat don't transfer from wall (hot) to fluid (cold) in which I mesh each one separately. what wrong ?

Hi
I know this thread is old but i need your advice!
Could you solve your problem? I have same problem! I meshed two region in gambit and when i run my case no heat flux cross the boundary. And just one region have rise in temperature.

Any idea?
Thanks in advance

Antanas December 4, 2016 12:46

Quote:

Originally Posted by Mohammad Jam (Post 628218)
Hi
I know this thread is old but i need your advice!
Could you solve your problem? I have same problem! I meshed two region in gambit and when i run my case no heat flux cross the boundary. And just one region have rise in temperature.

Any idea?
Thanks in advance

You should create interface between cell zones.

Mohammad Jam December 4, 2016 17:07

Quote:

Originally Posted by Antanas (Post 628235)
You should create interface between cell zones.

Hi Antanas
Thanks for your kind response

What kind of software should i creat interface?
I am working with gambit And i defined internal boundary condition between common face.

When i use hex grid for both region it is ok with internal bondary condition for common face but when i use tri mesh it doesnt couple!

Any idea is welcome

Best regards

Antanas December 5, 2016 02:03

Quote:

Originally Posted by Mohammad Jam (Post 628260)
Hi Antanas
Thanks for your kind response

What kind of software should i creat interface?
I am working with gambit And i defined internal boundary condition between common face.

When i use hex grid for both region it is ok with internal bondary condition for common face but when i use tri mesh it doesnt couple!

Any idea is welcome

Best regards

This is done in your CFD software (for ex. Fluent, CFX).

Mohammad Jam December 5, 2016 04:50

Quote:

Originally Posted by Antanas (Post 628295)
This is done in your CFD software (for ex. Fluent, CFX).

Hi
But i use openfoam software
Regards

Antanas December 5, 2016 05:37

Quote:

Originally Posted by Mohammad Jam (Post 628340)
Hi
But i use openfoam software
Regards

I never used OpenFOAM. I bet it has kind of manuals/guides, try search there. Also there's dedicaded forum here where you can ask questions.


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