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.

3D Periodic Boundary Condition - How to define Coordinate dependency manually?

Please login with a confirmed email address before reporting spam

Hi,

usually when I define 2 boundaries to be periodic, COMSOL automatically does the rest.
Meaning COMSOL decides which boundary is the source/Destination and also defines the coordinate-dependency like:

For a antiperiodic case where the boundaries are symmetric to the y- and z-axis,
Variable(x,y,z) on Boundary1 = - Variable(-x,y,z) on Boundary2

So far, this has never been a Problem for me. I''m just wondering how COMSOL choses the coordinate-dependency, especially when the boundaries are 3dimensional and rather complex.

Is there a way to manipulate the coordinate dependency?

Following is written in the equation view of the pc's:
mef.rsrcx_pc2 = mef.src_avg_pc2(x)
mef.rsrcy_pc2 = mef.src_avg_pc2(y)
mef.rsrcz_pc2 = mef.src_avg_pc2(z)

mef.rdstx_pc2 = mef.dst_avg_pc2(x)
mef.rdsty_pc2 = mef.dst_avg_pc2(y)
mef.rdstz_pc2 = mef.dst_avg_pc2(z)

Does anybody know what the Syntax means? I guess one can manipulate the coordinate dependency here, but how?

Thanks in advance






0 Replies Last Post 17 ago 2015, 10:44 GMT-4
COMSOL Moderator

Hello Jan

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.