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Adaptive mesh refinement on frequency scans
Posted Jul 3, 2012, 3:34 a.m. EDT Version 4.1 2 Replies
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Hi,
I was wondering if someone could help me understand the issue of adaptive meshing on frequency scans.
In principle I would like each frequency to have its own mesh. For low frequencies it's enough to have a course grid, whereas high frequencies are harder to resolve and require denser grids. In practice I think that a single mesh is used for all frequencies.
1. If true, than which solution (out of the entire set of solutions at multiple frequencies) is used for refinement? Is it the lowest or highest frequency, or maybe information from all solutions is used?
2. Can one impose a different mesh for each frequency?
3. Along the same lines, can one have different adaptive mesh refinement for each frequency?
Thanks, Silviu.
I was wondering if someone could help me understand the issue of adaptive meshing on frequency scans.
In principle I would like each frequency to have its own mesh. For low frequencies it's enough to have a course grid, whereas high frequencies are harder to resolve and require denser grids. In practice I think that a single mesh is used for all frequencies.
1. If true, than which solution (out of the entire set of solutions at multiple frequencies) is used for refinement? Is it the lowest or highest frequency, or maybe information from all solutions is used?
2. Can one impose a different mesh for each frequency?
3. Along the same lines, can one have different adaptive mesh refinement for each frequency?
Thanks, Silviu.
2 Replies Last Post Jul 5, 2012, 3:22 a.m. EDT
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Posted:
1 decade ago
Hi
I can propose a few methods, you can set the max mesh size by a variableand have this variable updated by thecurrent frequency value, if you are then in adaptive mesh it would have adapted values (but this does not mean it will decide to remsh)
Next issue is to get COMSOL to remesh, this is normally checked with the specific Parametric Sweep node you put ahead of the other solver nodes, then you will get a fresh remesh with each time adapted mesh size to the frequency.
I believe there is an example in the model library, or it's part of the many tricks you learn in the COMSOL mesh training course, cannot remmeer clerly ;)
--
Good luck
Ivar
I can propose a few methods, you can set the max mesh size by a variableand have this variable updated by thecurrent frequency value, if you are then in adaptive mesh it would have adapted values (but this does not mean it will decide to remsh)
Next issue is to get COMSOL to remesh, this is normally checked with the specific Parametric Sweep node you put ahead of the other solver nodes, then you will get a fresh remesh with each time adapted mesh size to the frequency.
I believe there is an example in the model library, or it's part of the many tricks you learn in the COMSOL mesh training course, cannot remmeer clerly ;)
--
Good luck
Ivar
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Posted:
1 decade ago
Hi Ivar,
Many thanks, your solution works...
Silviu.
Many thanks, your solution works...
Silviu.