Learning Forum

[graihan]

Dear Altruists, 

I wanted to model a conjugate flow problem. But I am very confused about the solid body motion. Would you please help me to decide when I can use frame motion and when I can use solid motion? would you please tell me what the meaning of " solid zone is not moving with respect to adjacent solid zone

[Federico]

Hello, 

"solid zone is not moving with respect to adjacent solid zone" means just that. If you have 2 adjacent solid zones in your model and they are both moving relative to one another (they are not moving together), then you cannot use Frame motion.

You are doing conjugate heat transfer modeling with motion I suppose? Perhaps we would be able to be more specific if you share some screenshots of what your model looks like.

[graihan]

Dear Fedrico, 

Thank you so much for your reply. I actually wanted to model conjugate heat transfer of a solid fluid domain. In my work, I actually created two solid body and 2 fluid body. solid body 2 and fluid body 1 is rotating at the same rotational speed and fluid body 1 has a inlet velocity. fluid body 3 and solid body 4 are stationary. I wanted to see the temperature raise due to viscous dissipation. I couldn't the solid body. I would appreciate if you could tell me how I can rotate the solid body. Thank you so much!

[graihan]

 

[Federico]

You should consider using a Dynamic Mesh 12.6. Using Dynamic Meshes (ansys.com).

Here's an example: ANSYS Fluent: Dynamic Mesh Problem for a Piston and Reed Valve - Part I - YouTube (you may not need the 6DOF model)

You can prescribe the solid/fluid1 motions using a profile.

[graihan]

Dear Federico, 

Thank you so much for your reply. If I do the dynamic mesh, do I have to define the cell zone of the solid as a solid motion or do I have to keep it unmarked in the cell zone condition-solid section?

 

Thanks again!

[Federico]

You may leave it unmarked, and define the Dynamic meshing parameters for this zone as Rigid Body