Menu

Discussion Forum

New Discussion
Filtrer

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 The information provided may be out of date.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.

Using Quarter Symmetry

Posted 8 janv. 2013, 08:00 UTC−5 Version 4.2 4 Replies

Ruzbeh
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi

I having problem using symmetry to simulate my model. For example I have a 3D ring and I want to use the quarter of the model to reduce the computation time. But how to use the quarter of the ring? Is it by drawing a quarter of a ring and then import to comsol or I can apply a quarter symmetry on the full model?
Thanks.
4 Replies Last Post 20 août 2013, 05:32 UTC−4
Nagi Elabbasi Facebook Reality Labs
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 8 janv. 2013, 08:53 UTC−5
You can draw a quarter ring or import the full ring and cut out a quarter in COMSOL. You can do that by creating a block (at the right location) and taking the intersection of that block with the full ring.
You can draw a quarter ring or import the full ring and cut out a quarter in COMSOL. You can do that by creating a block (at the right location) and taking the intersection of that block with the full ring.
Ruzbeh
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 8 janv. 2013, 09:37 UTC−5
As I am interested in mode shape and eigenfrequency, how do I define the boundary conditions? I have put symmetry boundary condition on both sides of the quarter ring, but I the results don't seem to be what I expected. Is there any role of anti symmetry here?
As I am interested in mode shape and eigenfrequency, how do I define the boundary conditions? I have put symmetry boundary condition on both sides of the quarter ring, but I the results don't seem to be what I expected. Is there any role of anti symmetry here?
Nagi Elabbasi Facebook Reality Labs
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 8 janv. 2013, 10:26 UTC−5
With symmetry you only get a subset of all eigenmodes (the symmetric ones only). To get more the rest you should solve again with antisymmetry boundary conditions.
With symmetry you only get a subset of all eigenmodes (the symmetric ones only). To get more the rest you should solve again with antisymmetry boundary conditions.
Md. Selim Habib
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 20 août 2013, 05:32 UTC−4
Hi,
I have designed photonic crystal fiber. Now i want to simulated only quarter symmetry of the fiber for the less computation time. How can solve?

Thanks in advance.
Hi, I have designed photonic crystal fiber. Now i want to simulated only quarter symmetry of the fiber for the less computation time. How can solve? Thanks in advance.

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