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PML Coordinate Stretching

Posted May 22, 2013, 9:16 a.m. EDT Structural Mechanics Version 4.3a 4 Replies

Ruzbeh
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When I see the equation mode, PML in one of the direction (mapped coordinate e.g. y direction) is stretched to complex number but another remains only real for my 2D analysis, why is that?

Also does PML work for eigenfrequency analysis?

Any help would be appreciated. Thanks.

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4 Replies Last Post Oct 21, 2013, 8:58 a.m. EDT
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Hello Ruzbeh

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Zhanghua Han
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Posted: 1 decade ago Jun 26, 2013, 3:22 p.m. EDT
I guess that's because in that domain only waves propagating in the Y direction need to be absorbed.
I guess that's because in that domain only waves propagating in the Y direction need to be absorbed.
Ruzbeh
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Posted: 1 decade ago Jul 24, 2013, 3:46 p.m. EDT
So far I have been successful in getting results using rational strecthing. Whenever I use polynomial stretching, it gives me erroneous results. What is the basic difference between these two?
So far I have been successful in getting results using rational strecthing. Whenever I use polynomial stretching, it gives me erroneous results. What is the basic difference between these two?
Ruzbeh
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Posted: 1 decade ago Sep 26, 2013, 7:51 a.m. EDT
For rational PML stretching option, the equations obtained from the model is different from the one provided in reference guides. Can someone please explain how comsol uses rational stretching?
For rational PML stretching option, the equations obtained from the model is different from the one provided in reference guides. Can someone please explain how comsol uses rational stretching?
Ruzbeh
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Posted: 1 decade ago Oct 21, 2013, 8:58 a.m. EDT
Does anyone have any information regarding the rational streching of PML in COMSOL? I am trying to find out how COMSOL determines parameters for rational stretching.
Does anyone have any information regarding the rational streching of PML in COMSOL? I am trying to find out how COMSOL determines parameters for rational stretching.

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