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PML Coordinate Stretching

Posted 22 mag 2013, 09:16 GMT-4 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 21 ott 2013, 08:58 GMT-4
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Hello Ruzbeh

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Zhanghua Han
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Posted: 1 decade ago 26 giu 2013, 15:22 GMT-4
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 24 lug 2013, 15:46 GMT-4
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 26 set 2013, 07:51 GMT-4
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 21 ott 2013, 08:58 GMT-4
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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