PML Coordinate Stretching

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Ruzbeh

Ruzbeh

May 22, 2013 1:16pm UTC

PML Coordinate Stretching

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.

Attachments:   PML_eqn.jpg  

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Zhanghua Han

Zhanghua Han

June 26, 2013 7:22pm UTC in response to Ruzbeh

Re: PML Coordinate Stretching

I guess that's because in that domain only waves propagating in the Y direction need to be absorbed.

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Ruzbeh

Ruzbeh

July 24, 2013 7:46pm UTC in response to Zhanghua Han

Re: PML Coordinate Stretching

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?

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Ruzbeh

Ruzbeh

September 26, 2013 11:51am UTC in response to Ruzbeh

Re: PML Coordinate 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?

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Ruzbeh

Ruzbeh

October 21, 2013 12:58pm UTC in response to Ruzbeh

Re: PML Coordinate 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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