[ANSYS Meshing] Mesh for conjugate heat transfer

hassaan · June 20, 2011, 16:13

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, 04:34

Check ´the 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, 13:58

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, 02:53

Quote:

Originally Posted by PSYMN

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, 14:50

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, 11:10

Quote:

Originally Posted by hassaan

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

wethiq · July 6, 2015, 05:13

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

Quote:

Originally Posted by wethiq

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

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

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

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

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

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.

June 20, 2011, 16:13	Mesh for conjugate heat transfer	#1
hassaan New Member Hassaan Rafi Join Date: Jun 2011 Posts: 7 Rep Power: 15	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

June 24, 2011, 13:58	Multi-body part...	#3
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	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... Mazze[ITA] and rasekh64 like this. __________________ ----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey

June 28, 2011, 14:50		#5
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	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". __________________ ----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey

July 6, 2015, 05:13	conjugate heat transfer	#7
wethiq New Member ressan Join Date: Apr 2013 Posts: 4 Rep Power: 13	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 ?

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June 21, 2011, 04:34		#2
Moonlight New Member Join Date: Jan 2011 Posts: 9 Rep Power: 15	Check ´the connectivity of the faces. If you are a GAMBIT user, the color of the line between two faces should be pink.