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.
No solution found and singular matrix while adding surface charge accumulation
Posted 20 mag 2023, 08:55 GMT-4 0 Replies
Please login with a confirmed email address before reporting spam
Dear experts,
I tried to add the "surface charge accumulation" boundary condition in my model, however, similar error always occurs whatever I tried anyother models. The error shows below,
No solution found. Singular matrix.
For grid instance 0, there are 24470 empty equations (empty rows in the variable comp1. es. sigs matrix).
Located at coordinates: (3.86266e-05, 0.000104901, -1.78427e-05), (4.53078e-05, 0.000107954,0), (4.49185e-05, 0.000108396, -8.00708e-07), (4.50445e-05, 0.000108663, -4.00354e-07), (4.48016e-05, 0.000109384, -8.00713e-07)
The returned solution does not converge. Not all parameter step sizes were returned.
Do they lack of some constraint conditions？The models I tried can run smoothly before I add the "surface charge accumulation" boundary condition", I am confused why the errors are similar for all of them.
Thanks very much for your help.
Best regards Xiaoxia
Hello Xiaoxia Li
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.