Learning Forum

[suraj9735]

I see in Fluent some unknown boundary condition automatically generated and it also does not highlight when I use highlight options unlike others named boundary condition does. How can I know more about it such that I can assign it proper conditions or can ignore it if not necessary?

I found the named bc can be highlighted.

Please give me some link to understand it properly.

Thank you very much!

[Amine Ben Hadj Ali]

The walls you want to highlight are empty and that is why they cannot be shown or highlighted. These walls are interface walls which are created amid interface connection creation and play the role of placeholder whenever the interfaces are non-overlapping. The same applies for interior-6 which i the placeholder for the fraction of the interface sides which are overlapping and forms then an interior (permeable for fluid flow)

[Amine Ben Hadj Ali]

Moving to the related Fluid Dynamic Thread for followup questions.

[José Mantovani]

To add the explanation of Abenhadj: make sure that in the mesh process you have defined the boundary conditions, from this FLUENT will respect your definition and you can change this at the time of configure solver.

Regards,

Mantovani. 

[Karthik Remella]

Hello,

Just to add one comment: if you have not already tried, please try and create a conformal mesh. A conformal mesh will help you have a cleaner model. Here is a discussion link from the student community which goes into the details of using a conformal mesh. You can use the 'Share topology' feature in Design Modeler or SpaceClaim to do this. 

/forum/forums/topic/shared-topology-to-replace-bonded-contact/?order=all#comment-1790c07d-b9ab-4700-9de6-a84c000c1dba

I hope you find this useful.

Thank you.

Best Regards,

Karthik

[suraj9735]

 Thank You All!

Hello, Abenhedj,

As you said the walls I want to highlight are empty but Fluent asked me to put boundary condition, So what boundary condition should I put?  

What do you mean by interfaces are non-overlapping in my model. It seems me I have perfectly matched two mold plate core and cavity. For your clarification, I am uploading geometry screenshots.

 

[suraj9735]

Can you please tell me what boundary condition should I put for wall 15 and wall 16?

I put coupled for wall 6 and its shadow. It also can be highlighted and show the contact region of the core and cavity.

[Karthik Remella]

Hello,

Are you performing a system coupling between Steady State / Transient Thermal and Fluent? I ask you this question because in the previous post you show a screenshot of what looks like either Steady State or Transient Thermal package and the next one is in Fluent. If you are doing this and you would like the temperature data to be read from Transient / Steady State Thermal into Fluent, you might want to use 'via system coupling'. Again, I am not sure if this is what you are trying to do.

Also, I am not really sure what 'wall-15' and 'wall-16' really refer to. Could you please post some screenshots of the same? Could you also please elaborate your workflow? It might bring it more clarity if you can highlight your physical model here.

Thank you.

Best Regards,

Karthik