Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

PML Error: Could not find any cartesian regions

Please login with a confirmed email address before reporting spam

Hi

I am new to PML. I am using Structural mechanics module to implement PML in a cantliver to determine the waves propagating to the PML. I am getting this error: Could not find any cartesian regions. My dimensions are in micro meter but using conversions to use it in meters. Please suggest what am I missing here.

Is there any model on PML using SM module?
Thank you.

3 Replies Last Post 20 mag 2013, 10:31 GMT-4
Sergei Yushanov Certified Consultant

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 14 mag 2013, 15:31 GMT-4
Ruzbeh,

In structural mechanics, PMLs are available in frequency domain only.

If you are in SM time domain, you need to use Low-Reflecting Boundary instead.

Message “Could not find any cartesian regions” usually means that you are trying to impose PML to the layer that is not of rectangular shape.

Regards,
Ruzbeh, In structural mechanics, PMLs are available in frequency domain only. If you are in SM time domain, you need to use Low-Reflecting Boundary instead. Message “Could not find any cartesian regions” usually means that you are trying to impose PML to the layer that is not of rectangular shape. Regards,

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 15 mag 2013, 06:13 GMT-4
Thank you for the reply. I was solving an eigenfrequency problem. I guess I need to go for freqeuncy domain analysis. But, my PML domain is a rectangular block.
Thank you for the reply. I was solving an eigenfrequency problem. I guess I need to go for freqeuncy domain analysis. But, my PML domain is a rectangular block.

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 20 mag 2013, 10:31 GMT-4
I was wondering if elastic wave propagation is possible to simulate using SM. Do I need to couple wave equation to SM? Please advice. I am struggling with that.
I was wondering if elastic wave propagation is possible to simulate using SM. Do I need to couple wave equation to SM? Please advice. I am struggling with that.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.