Pressure Diverging at the Trailing Edge of an Aircraft Wing

Project Support
1

Hi everyone,

I am running an external aerodynamic simulation of a concept aircraft model and I found that the pressure is diverging very early in the simulation. I ran multiple models before with a NACA 0010 airfoil and didn’t have this issue, however, I recently changed it to a significantly more complicated one and now the simulation is crashing constantly along the trailing edge of the wing.

I attempted refining the grid size by reducing the local element size and the refinement region elements but even with a mesh of about 40 million cells, the same thing occurs. I realise that the grid is by no means perfect however I’m not very experienced with SimScale meshing tools and I don’t want to just keep throwing more cells at the model. Perhaps there’s an issue elsewhere? I am using the k-omega SST model, I have the model at a low angle of attack and it’s set to a low velocity of about 30m/s.

Do you have any ideas what could be the cause of this? Below I have attached a screenshot of the airfoil when the mesh is about 20 million cells. Let me know if you need any more details.

Airfoil
Airfoil1493×452 127 KB

Thank you in advance,

Jakub

2

Hey Jakub,

Please share the link to your project, so we can have a close look to the setup and the mesh.

Otherwise, I can just share with you general suggestions, as those outlined in the following documents:

3

It is a private project but I think you should have access since it’s shared with the support team.

Thanks,

Jakub

4

It looks like a very very rough mesh for a grid of 20 million elements. Are you doing region refinements? Did you do any airfoil tutorials before starting your project?