[tafa]

Hello dear Eng. and Scientists,

I am trying to model a sub-cooled flow boiling in vertical channel under deterioration conditions. Using Design modeler, I have done the structure's geometry and I used the workbench's meshing tool for the meshing. You can find in the attached file a view of the structure. The heat is applied using a UDF on the left wall of the heated element. The heat an the Clad are considered as Solids while the Flow_Channel is a Fluid zone. The heat transfer from the Heated Element to the Clad without problem, but does not go into the Fluid part. If someone could help me with this issue I will be grateful.

Thanks in advance,

Regards,

Tafany Muller
Fluid Mechanics Eng.

[anbu2cfd]

Hi,
Had you define interface between clad and fluid zone if not so create a interface and specify it has general connection, there should be a mesh interface between different zones if not so heat cant be transfered.
If your working under workbench platform, once your modeling is over select the parts under specification tree and right click and select form new part. then go ahead with mesh so that automatically interfaces will be set for your problem.


hope it will help you.

[ssixr]

hi tafany,
your problem looks like conjugate heat transfer.. Did you define set the coupled boundary conditions?
Sudhir

Originally Posted by anbu2cfd

Hi,
Had you define interface between clad and fluid zone if not so create a interface and specify it has general connection, there should be a mesh interface between different zones if not so heat cant be transfered.
If your working under workbench platform, once your modeling is over select the parts under specification tree and right click and select form new part. then go ahead with mesh so that automatically interfaces will be set for your problem.


hope it will help you.

[amin.z]

Originally Posted by tafa

Hello dear Eng. and Scientists,

I am trying to model a sub-cooled flow boiling in vertical channel under deterioration conditions. Using Design modeler, I have done the structure's geometry and I used the workbench's meshing tool for the meshing. You can find in the attached file a view of the structure. The heat is applied using a UDF on the left wall of the heated element. The heat an the Clad are considered as Solids while the Flow_Channel is a Fluid zone. The heat transfer from the Heated Element to the Clad without problem, but does not go into the Fluid part. If someone could help me with this issue I will be grateful.

Thanks in advance,

Regards,

Tafany Muller
Fluid Mechanics Eng.

Dear Tafany!
your problem caused because the solid and fluid surfaces aren't unit!
In the design modeler you must select the solid domain and fluid domain and form a new part! so the solid and fluid domains have a shared surface and in the ANSYS meshing they have same surface mesh!
then in the fluent you will see that a part added with "shadow" post fix! in the boundary condition setting you must select the coupled for solid and fluid domain! but in the previous condition wasn't coupled option!