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 The information provided may be out of date.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.
Assigning electric potential
Posted 26.10.2011, 09:51 GMT-4 Low-Frequency Electromagnetics, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 4.1 2 Replies
Please login with a confirmed email address before reporting spam
we are having trouble in solving this simple problem:
to assign an elettric potential and a ground to the extremity of a coil the is inside an air sphere (see attached model "example1.mph".
This is the error message we got from comsol solver:
Failed to find a solution.
Singular matrix.
For mesh-case 0 there are 29182 void equations (empty rows in matrix) for the variable mod1.V
at coordinates: (0.499384,0.0364705,0.0103258), (0.49923,0.0367934,0.0106871), (0.498941,0.0367463,0.0103436), (0.499489,0.0370084,0.0103114), (0.500466,0.028009,0.0103919), ...
and similarly for the degrees of freedom (empty columns in matrix)
Returned solution has not converged.
Thank you
Adriano
Attachments:
Please login with a confirmed email address before reporting spam
Why the air does not surround all the coil? So it is not "a coil the is inside an air sphere".
Please login with a confirmed email address before reporting spam