Hello,
I have an issue where particles are breaking through my mesh. I believe my moving mesh is pushing/ squeezing particles into the stationary mesh. I understand that there could be many reasons that cause this issue but I think it has to do with the warning: "WARNING: Fix mesh: Mesh contains highly skewed element, moving mesh (if used) will not parallelize well (../surface_mesh_I.h:484)".
I have tried playing with the settings of STL converter (see stl_settings.jpg). I am converting the cad files in Autodesk Inventor. I tried the high resoultuion and also reducing the surface & normal deviation. I also tried lowered settings but it usually causes my program to crash. I have also tried changing the curvature in my mesh/surface/stress style; I have curvature at 1E-5 right now. Does anyone have any ideas about what else I can try to get rid of this warning? Should I try a different STL converter?
Thank you,
Anthony
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AJ.Spin | Mon, 04/14/2014 - 17:48
Nevermind
Nevermind, small tweaks to the geometry was enough to get rid of the warnings and fix the issue.
kevin.eipe | Mon, 04/27/2015 - 06:48
Hi Anthony,
Hi Anthony,
I have the same warning as you did. Could you please explain how you tweaked the geometry?
Thanks
Kevin
chewnins | Tue, 04/28/2015 - 00:19
Use a mesher
The problem with many of the CAD generated STLs is that they will have very high aspect ratio sliver triangles. I have found that taking a STEP file into GMSH and putting a 3 node triangle 2d surface mesh is the most reliable way.
Depending on the CAD software if you can divide the faces into squares or triangles first it can be beneficial.
-Scott
bilalelkassem | Mon, 02/19/2018 - 17:05
Hey, could you please explain
Hey, could you please explain it more?
What do you mean with: putting a 3 node triangle 2d surface mesh ?
Is it Mesh -->Define --> 2D ?
AJ.Spin | Mon, 11/30/2015 - 21:41
aspect ratio
This is sort of late and Scott pointed out what I had to change. The high aspect ratio is the reason for the skewed elements. I maybe too conservative but I do not think I ever make the aspect ratio greater than 1.5 now.
-Anthony