Menu

Discussion Forum

New Discussion
Filter

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 The information provided may be out of date.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.

Unobserved explected plane wave symmetry

Posted Jul 15, 2014, 12:06 p.m. EDT Acoustics & Vibrations Version 4.3 0 Replies

Alejo Alberti
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi everyone. I'm working on an very simple acoustics model in which a plane wave excites the space between two parallel walls. (1) First of all I couldn't find a way to impose a plane wave excitation which does not come from one of the extreme boundaries of the system. Could someone please give me a clue on this?

Now, since I wasn't able to figure that out I instead used a Background Pressure Field in the desired direction. Something weird came up: (2) if the incident field is parallel to the walls (x direction) then the total field is symmetric in the y direction, as expected, but not on the x direction. The results seem to point to a numerical error. If I insted use a field perpendicular to the walls, coming in the y direction, then the result is symmetric in the x direction, but not on the y.

I checked that when I impose a Background field one of its maximums is in the middle of the geometry, as desired, so the error does not come from that. I also used a symmetric mesh.

If anyone can give me some clues on either (1) or (2) of the issues I'd be very thankful.
'Till next time!
0 Replies Last Post Jul 15, 2014, 12:06 p.m. EDT
COMSOL Moderator

Hello Alejo Alberti

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

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.

Suggested Content