SimScale CAE Forum

HVLS simulation

I have problem with diverging in my solver. I can not figure out what can be the problem. https://www.simscale.com/workbench/?pid=8557524873764814152&mi=spec%3A9c9ecced-8354-497d-8645-bd8b9da8dc19%2Cservice%3ASIMULATION%2Cstrategy%3A2&ps=analysis%2FIncompressible--oneOf%2FboundaryConditions%2F3

Hello @cdrivsholm,

Whenever this issue happens, the usual troubleshooting steps are given in this article.

From your particular project, we have 4 different divergence points.

By inspecting the location of these points, notice that all of them are located at the trailing edge of the rotating blades:

This is naturally not happening by a coincidence. For each of the blades, there is a very small face without any refinement on the trailing edge which is causing issues.

As the article mentions, the options here are twofold:

  • Change the mesh settings around this region (e.g. by applying a local refinements)
  • Try to make changes in the CAD model (e.g. by making the trailing edge blunt, instead of having a very small radius).

Cheers