Menu

Discussion Forum

New Discussion
Filter

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.

V4 RF What increases computing time?

Posted Oct 17, 2010, 1:36 p.m. EDT 1 Reply

Irfan
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

hi,

Does the it the physical size of the model or the electrical size that causes increase in computing time excessively, though no memory error comes.

So I need to know where to focus on physical or electrical size for reduced computing time?

Thanks

Irfan
1 Reply Last Post Oct 18, 2010, 2:04 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Oct 18, 2010, 2:04 a.m. EDT
Hi

there are many issues: first certainly the number of DoF (degrees of freedom) mainly related to the meshing density or the volume. To improve, try reducing from 3D to 2D and use symmetry.

Then you have non linear effects that makes the sovler iterate a lot, try starting in linear mode (check your varables, do you need material non linearities etc

further you have time stepping if you are in transient, do you really need all those intermediate times ? are there weays to analyse the system over a shorter time period ...

Can you use a modal approach instead of transient etc

--
Good luck
Ivar
Hi there are many issues: first certainly the number of DoF (degrees of freedom) mainly related to the meshing density or the volume. To improve, try reducing from 3D to 2D and use symmetry. Then you have non linear effects that makes the sovler iterate a lot, try starting in linear mode (check your varables, do you need material non linearities etc further you have time stepping if you are in transient, do you really need all those intermediate times ? are there weays to analyse the system over a shorter time period ... Can you use a modal approach instead of transient etc -- Good luck Ivar

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