Menu

Discussion Forum

New Discussion
查找

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 The information provided may be out of date.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.

About conservative flux convection coefficient

Posted 2015年7月29日 GMT-4 13:50 Low-Frequency Electromagnetics, Microfluidics, Materials, Studies & Solvers Version 4.4 0 Replies

Jianyuf Miao
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

hi everyone, im doing the simulation for the partial discharge. i keep encountering the problem when set the conservative flux convection coefficient in the coefficient form PDE model. the enclosed file shows the equation im trying to built and the comsol model.
i set 3 convection-diffusion equation mode, and i found it is the conservative flux convection coefficient makes modelling wrong. the error shows:
Repeated error test failures. May have reached a singularity.
Time : 1.225672249096233e-008
Last time step is not converged.
- Feature: Time-Dependent Solver 1 (sol1/t1)
if i change this coefficent as constant say: 1,2,3,4. its ok. but if i set any other parameter related to t, it will be error. but in mye case, i need to set the parameter related to electric field, which change with t all the time. so i have no idea how to set these equation, anyone can help me?
0 Replies Last Post 2015年7月29日 GMT-4 13:50
COMSOL Moderator

Hello Jianyuf Miao

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