The Siemens Community Catalyst program was co-created with our community to acknowledge technology leaders who consistently contribute to the Siemens Community. Nominations are accepted on a rolling basis.
I have got a question, concerning the mesh quality. Can you please tell me, what these values, from the MeshSim.txt file are standing for?
What are the mesh quality statistics at the end of the Meshing output file?
SKEWNESS: The equilateral or equivolume skewness is non-dimensional ranging from 0 (perfect tetrahedron) to 1 (degenerate). S = ( V_opt - V ) / V_opt V_opt = 8/27 * sqrt(3) * R^3 = Perfect tetrahedron volume V = tetrahedron volume R = circumsphere radius
ASPECT RATIO: Aspect ratio is non-dimensional ranging from 1 (perfect tetrahedron) to infinity (degenerate). AR = Longest Edge / Shortest Altitude
DIHEDRAL ANGLE: Cosine of the dihedral angle of the tetrahedron. Smallest and largest are given.
rByR: The unitized ratio of the insphere radius to the circumsphere radius of the tetrahedron. You see '-1.0' as the minimum if there are non-tetrahedral elements.
The question is how to reduce the max. volume skewness?
I would be glad for it.
Thanks
The typical reason for high value of volume skewness is boundary layer elements. In order to reduce it, you would have to mesh the surface finer (will increase the total element count) or use coarser BL elements (has impact on accuracy!).
Thanks for your suggestion, ydigit!
Hi again,
i am still thinking about the reduction of max volume skewness. To get a good y+ value, you have to create a first layer thickness at about 10e-4, 10e-5 m. Or finer or coarser depends on your case. So, in this case i could probably have really fine mesh on all surfaces (advice from ydigit) that is not always possible, if you have big models with details. For Hypermesh, there is a option for the target volume skewness. At acusolve, it was for me also possible to reduce the volume skewness with option volume improver shape metric. But without boundary layers!
What is the way to get a good mesh with a volume skewness 0.95?
Thanks for help
Best regards
AcuSolve is much more tolerant of element skewness than most other solvers, so in most cases there is no need to focus so much on individual element quality, even with tetrahedral boundary layer elements. So 'good mesh' is related more to the locations of nodes making sure the gradients are captured, rather than how those nodes are used to define elements.
Join us for a community conversation on how High-Performance Computing (HPC) and Simcenter PSIM work together to meet the increasing demands of modern power electronics simulation. During this one-hour technical session, you'll discover how leveraging HPC can speed up simulations, improve scalability, and empower engineers…
Join us for a community conversation on accelerating your motor simulation workflow with Simcenter Simlab. In this beginner-friendly session, we'll introduce the platform's automated model-building capabilities and show how easy it is to set up your first electric motor analysis. You'll see the basic steps of geometry…
Join us for a Community Conversation where we'll discuss practical approaches to analyzing complex electromagnetic models using hybrid solver techniques. This session will provide a general overview of how different computational methods can be combined within a single simulation to address models containing varied…
