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PML or SBC
Posted Aug 22, 2016, 10:59 a.m. EDT Version 5.0 4 Replies
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Hi
i was working in a 2D microstructured fiber and some doubts become to appear, i hope someone can help me.
1 which one is better to not consider the the reflected waves just the incident in the configuration ?
2 When i try to implement the PML i just can select a domain, there's anyway to consider a boundary as a PML ?
i was working in a 2D microstructured fiber and some doubts become to appear, i hope someone can help me.
1 which one is better to not consider the the reflected waves just the incident in the configuration ?
2 When i try to implement the PML i just can select a domain, there's anyway to consider a boundary as a PML ?
4 Replies Last Post Sep 27, 2016, 3:57 p.m. EDT
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Posted:
8 years ago
Hello,
1. It's better to use PML, because it absorbs all the waves that are incident on it. SBC is transparent only for some kind of waves (see COMSOL Help for more info).
2. PML must have finite length, so it must be a domain, not a boundary. Practically I set it's length of order of a wavelength.
1. It's better to use PML, because it absorbs all the waves that are incident on it. SBC is transparent only for some kind of waves (see COMSOL Help for more info).
2. PML must have finite length, so it must be a domain, not a boundary. Practically I set it's length of order of a wavelength.
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Posted:
8 years ago
Thanks for the help
I have another question maybe you can help me again, I can use PML when i studyng mode analysis ?
I try to set a pml in a domain arround my configuration and when a try to compute an error occur.
" Error in multiphysics compilation.
- Feature: Compile Equations: Mode Analysis (sol1/st1) "
Best Regards
Master student Markos Paulo cardoso
I have another question maybe you can help me again, I can use PML when i studyng mode analysis ?
I try to set a pml in a domain arround my configuration and when a try to compute an error occur.
" Error in multiphysics compilation.
- Feature: Compile Equations: Mode Analysis (sol1/st1) "
Best Regards
Master student Markos Paulo cardoso
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Posted:
8 years ago
Hi,
yes, you can use PML in Mode Analysis.
There may be many reasons for your error. I can only advise you to check your model. Check if the type of PML corresponds to your geometry (it can be cartesian, cylindrical, spherical). Check all the fields in mode analysis study.
Good luck!
yes, you can use PML in Mode Analysis.
There may be many reasons for your error. I can only advise you to check your model. Check if the type of PML corresponds to your geometry (it can be cartesian, cylindrical, spherical). Check all the fields in mode analysis study.
Good luck!
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Posted:
8 years ago
Thanks for the help, i get those results
Best Regards
Best Regards