2 Replies Latest reply on Jan 20, 2013 7:28 PM by Jeremy Notestine

Do convergence tests work when using curvature-based meshing?

Jeremy Notestine Jan 20, 2013 5:12 PM

I'm trying to graph a convergence plot on a few high stress spots of my model but even with a large mesh size, it appears to be converged. There isn't much difference between a large and very fine mesh size. I'm thinking this is because I have curvature based meshing checked and therefore there are more nodes in that area. Does that seem right?

Is there a different way convergence tests are conducted when curvature based meshing is used?

Thanks,

Jeremy

Converge1.jpg 27.9 KB

Re: Do convergence tests work when using curvature-based meshing?

Billy Wight Jan 20, 2013 6:53 PM (in response to Jeremy Notestine)

You should be plotting local element size (where you're reporting the stress of interest) vs. stress, not global element size. Convergence tests don't care about what meshing algoritm you're using, you just need to be sure you're looking at the right data. It may be that the local mesh size is not changing much even though the global mesh size is.
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- Re: Do convergence tests work when using curvature-based meshing?
  
  Jeremy Notestine Jan 20, 2013 7:28 PM (in response to Billy Wight)
  
  Billy, thank you for the response. That does make sense.
  I applied a fine surface mesh control at the interface I am interested in (and where I am taking stress data). Therefore, I think the local mesh size should be what I set as the mesh control...
  
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