Low Reflecting Boundary Condition

Please login with a confirmed email address before reporting spam

I'm using Low-Reflecting BC instead of PML to absorb my harmonic loading applied perpendicular to the wall of the structure. Since it can be only applied at outer boundaries, what is the minimum distance of the LRBC from the time dependent study domain?


2 Replies Last Post Sep 12, 2024, 5:33 p.m. EDT

Please login with a confirmed email address before reporting spam

Posted: 2 months ago Sep 12, 2024, 12:36 p.m. EDT

Low reflecting means low not zero. So the distance should be great enough that the reflected wave does not interfere with the process you are trying to simulate.

If the wave is normally incident you should be able to tune the low-reflecting condition to minimize the reflected wave.

Low reflecting means low not zero. So the distance should be great enough that the reflected wave does not interfere with the process you are trying to simulate. If the wave is normally incident you should be able to tune the low-reflecting condition to minimize the reflected wave.

Please login with a confirmed email address before reporting spam

Posted: 2 months ago Sep 12, 2024, 5:33 p.m. EDT

Thank you very much.

For saving computational time I considered my LRBC distance from the time dependent study domain as half of wavelenght.

Thank you very much. For saving computational time I considered my LRBC distance from the time dependent study domain as half of wavelenght.

Reply

Please read the discussion forum rules before posting.

Please log in to post a reply.

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.