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Posted:
1 decade ago
21 mars 2013, 14:26 UTC−4
However, when extending the layered film material into PML, the performance of PML obviously is not good, even worse than Scattering BC without PML.
I do it all the time and the performance is very good. I see virtually no reflection from PML's inner boundaries within ~10^(-6) precision. Try playing with PML's options.
By the way, make sure to use same material properties for PML as for the corresponding films.
[QUOTE]
However, when extending the layered film material into PML, the performance of PML obviously is not good, even worse than Scattering BC without PML.
[/QUOTE]
I do it all the time and the performance is very good. I see virtually no reflection from PML's inner boundaries within ~10^(-6) precision. Try playing with PML's options.
By the way, make sure to use same material properties for PML as for the corresponding films.
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Posted:
1 decade ago
21 mars 2013, 14:45 UTC−4
Dear Alexander,
Your comment is highly appreciated. I am very glad to learn that it is indeed possible to improve it by fine tuning the PML settings, which is also the purpose I am seeking help here.
Yes, I did use same material for the inner domain and the PML for corresponding layers. BTW, there is a metal film among the layers.
I am using Comsol v4.3a, the only parameters I saw for tuning the PML setting are PML scaling factor and scaling curvature. FEA is kind new to me, I randomly tried different values for these two, but not successful. Could you please help explain a bit more detail of, e.g. the general strategies for tuning the PML parameters,if there are. If you allow, I can send in my test model.
Thank you very much,
Leiming
Dear Alexander,
Your comment is highly appreciated. I am very glad to learn that it is indeed possible to improve it by fine tuning the PML settings, which is also the purpose I am seeking help here.
Yes, I did use same material for the inner domain and the PML for corresponding layers. BTW, there is a metal film among the layers.
I am using Comsol v4.3a, the only parameters I saw for tuning the PML setting are PML scaling factor and scaling curvature. FEA is kind new to me, I randomly tried different values for these two, but not successful. Could you please help explain a bit more detail of, e.g. the general strategies for tuning the PML parameters,if there are. If you allow, I can send in my test model.
Thank you very much,
Leiming
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Posted:
1 decade ago
21 mars 2013, 17:05 UTC−4
You can upload your model here
You can upload your model here
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Posted:
1 decade ago
21 mars 2013, 18:07 UTC−4
You can upload your model here
Many thanks, Alex, uploaded.
Any insight you may offer is highly appreciated.
Leiming
[QUOTE]
You can upload your model here
[/QUOTE]
Many thanks, Alex, uploaded.
Any insight you may offer is highly appreciated.
Leiming
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Posted:
1 decade ago
21 mars 2013, 19:03 UTC−4
Sorry, can't open it because of version mismatch. I got 4.3 version
Sorry, can't open it because of version mismatch. I got 4.3 version
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Posted:
1 decade ago
21 mars 2013, 19:28 UTC−4
No problem, that's true, COMSOL is not forward-compatible.
Anyway, thanks for discussion. See if other experts may be able to offer some help.
Regards,
Leiming
No problem, that's true, COMSOL is not forward-compatible.
Anyway, thanks for discussion. See if other experts may be able to offer some help.
Regards,
Leiming
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Posted:
1 decade ago
20 déc. 2014, 22:20 UTC−5
Dear Alexander Kuznetsov,
I also have the same problem, can you upload your file to show how to fine tune the PML boundary condition? thanks
Dear Alexander Kuznetsov,
I also have the same problem, can you upload your file to show how to fine tune the PML boundary condition? thanks