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.

Time solver dynamics - advice

Please login with a confirmed email address before reporting spam

I'm in "currents and voltages" applying a current density pulse within a copper short going through the glass dielectric of a spherical copper capacitor. This is a biological equivalent, there is no ground (like the brain) and one cannot be asserted anywhere.

My problem is solver stability.

Time dependent, direct, mesh = finer. MUMPS.

I am getting variable convergence dynamics simply by setting different _durations_ of the simulation.

Can someone tell me if I get a convergence incident at step X, whether the results for data prior to step X are suspect?
Is the only time I can be confident when the entire simulation is convergence-incident free?

eg...If I truncate a simulation duration just prior to step X, where it previously diverged, why does the new simulaiton move the convergence problem INSIDE the time that was perfectly OK last time?.... and then produce slightly different results (voltages/times)....

confused Colin.


0 Replies Last Post 03.06.2013, 22:05 GMT-4
COMSOL Moderator

Hello chales

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.