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Meshing Strategy

User: "rorythornton"
rorythornton
Altair Community Member
Updated by rorythornton

Hello

 

I have been having a little dig through the mesh and aided mesh options in Flux to understand what the best meshing strategy is for simulating the interactions between static magnets (mainly disc and spherical permanent magnets).

 

I have done some research into these settings already (e.g. understanding what bubble packing is for face meshing), but I was wondering if anyone here has good knowledge on what settings get the highest level of simulation accuracy (while trying to minimise the number of required nodes and computation time)? Also, if anyone is able to point me in the direction of good literature about optimising meshes for magnetic interactions, that would be appreciated.

 

I do have some specific questions on the options available for mesh and aided mesh options:

  • Relative precision for distance between 2 points is 1e-5 for both geometry and mesh (despite flux recommending that the geometry is superior to the mesh) 
    • Is this a good starting value to do comparisons with (and is there any research/literature to support this)?
  • Is there any existing literature or experiments that compare the flux mesher to the MeshGems mesher to compare the differences in simulation accuracy?
  • For uniform vs Dynamic mesh points
    • Is the dynamic mesh point generator iterative? It doesn't seem like it based on it's description, but when I research 'Dynamic mesh points', all I find is information on types of 'Adaptive mesh refinement'
    • If dynamic mesh points are not iterative, is it only useful for reducing computation time?
  • Can anyone recommend good literature that compares relative node deviation (equal number of nodes on a given line) to absolute (equal spacing between all nodes)?
  • I am assuming the only benefit of mesh relaxation is to save computation time?
  • Can anyone recommend literature on the advantages/disadvantages of using, what flux refers to as, the aided shadowface (which is disabled by default)?

 

Another question I have is:

  • how do meshing requirements for electromagnetic simulations vary from structural ones? Can I use literature for structural FEA meshing and apply that to what I am doing here?
  • If anyone is able to recommend literature that compares the two, that would be appreciated

 

If anyone is able to comment on even one of the many points listed above, to help me understand how to optimise my meshing, I would greatly appreciate it!

 

Many Thanks


Rory

 

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