[PierceH]

Hello,



I have an overset grid in 3D that keeps crashing on intilization. This grid is essentially a wake refinement that stretches from the trailing edge of a wing downstream. The simulation is for steady subsonic flow, and when extracting the symmetry plane, one can successfully run the simulation in 2D with the overset plane. However, as I introduce this to 3D the simulation will not initialize properly and will instead crash. I'm wondering if having the overset mesh flush with the symmetry plane has anything to do with that. For the boundary of the overset that touches the symmetry plane I also define this to have a symmetry plane BC. Attached is the symmetry plane with the 2 meshes clearly identifiable.


Thanks and I hope someone can help.


Pierce

[4lix]

Hi Pierce,


Did you solved this problem ? And if yes, how?

I am facing the same issue as you. I want to simulate a ship in a wave field with a symmetry plane and overset mesh in 3D around the ship. I defined the boundary of the overset mesh flush with the symmetry plane as a symmetry BC as you but it keeps crashing.


Hope you can help me!



Best regards,


Alix

[PierceH]

Originally Posted by 4lix

Hi Pierce,


Did you solved this problem ? And if yes, how?

I am facing the same issue as you. I want to simulate a ship in a wave field with a symmetry plane and overset mesh in 3D around the ship. I defined the boundary of the overset mesh flush with the symmetry plane as a symmetry BC as you but it keeps crashing.


Hope you can help me!



Best regards,


Alix

Hi Alix,


I did manage to get around this, it seems like the symmetry plane interacting with an overset causes a memory leak. I was running on computing clusters and the job wasn't ending properly which led to further issues down the line so make sure you clear the memory. As for my solution, I simply mirrored the non overset component of the mesh, removing the need for a symmetry plane. Let me know your thoughts and we can discuss via message if you'd like.



Pierce

[Duke711]

Originally Posted by 4lix

Hi Pierce,


Did you solved this problem ? And if yes, how?

I am facing the same issue as you. I want to simulate a ship in a wave field with a symmetry plane and overset mesh in 3D around the ship. I defined the boundary of the overset mesh flush with the symmetry plane as a symmetry BC as you but it keeps crashing.


Hope you can help me!



Best regards,


Alix

A symmetry on the overset mesh is also wrong and is not supported by fluent. In the case of symmetry, there must be a geometric gap between the overset mesh and the plane of symmetry. If not, the zones should not be defined as a symmetry boundary condition for the overset mesh, but must be defined as an overset wall. With the reporting of orphan cells at the symmetry plane