My simulation always having an error - Velocity field started diverging to a value of 7.19678e+07 m/s near the position: (-1.801e-2, 0.016, -1.264e-2)

[dylan132024]

The project I’m currently working on is “SR-003”. This is the error message -

" Velocity field started diverging to a value of 7.19678e+07 m/s near the position: (-1.801e-2, 0.016, -1.264e-2). Please check the mesh quality near the reported location and try refining the mesh. If the problem occured near a boundary, please check the boundary conditions. In case of doubt, please ask for assistance via our support chat."

I’ve tried to improve the mesh quality, but if I turn up the quality too much then the machine would run out of memory. I’ve also tried to use hex-dominant meshing, and that also didn’t work, I never got past 0%. The coordinate that the message started seemed like a normal edge to me, so I don’t really understand whats going wrong… any help would be appreciated!

[shenoy]

Hey @dylan132024 ,

You can use mesh quality tools to see exactly where the mesh is of bad quality as follows:

I would recommend simplifying the geometry near this part of the rear wing OR adding a refinement only along that part of the wing to have a better mesh quality but as you said overall quality is already too high and memory issues are very much anticipated in such a case, especially with a community account. The more reliable option would be to simplify the geometry itself so you would not need a finer mesh in that region.

What I would also like to point out are such very thin (almost 1D) faces around the area of divergence:

A cleaner CAD would result in fewer errors, in general. Let us know how it goes.

Best,
Satvik