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.
Failed to find a solution. There are 1 void equations
Posted 2014年8月10日 GMT-4 22:38 Fluid & Heat, Heat Transfer & Phase Change, Heat Transfer Version 5.2a 1 Reply
Please login with a confirmed email address before reporting spam
I'm running a flow in a pipe and I'm using the Conjugate heat transfer physics. My model converges and gives me results when the fluid in the pipe is water. As soon as I change the fluid to Carbon Dioxide, I get the following error:
Failed to find a solution.
Singular matrix.
There are 1 void equations (empty rows in matrix) for the variable comp1.nitf.Pmfinl1.
at coordinates: (0,0,0), ...
There are 28 void equations (empty rows in matrix) for the variable comp1.p.
at coordinates: (0,-1.82291,0.0448905), (0,-1.8415,-6.245e-017), (0,-1.778,0.0635), (0,-1.82291,-0.0448896), (0,-1.73308,0.0448825), ...
There was an error message from the linear solver.
The relative residual (11) is greater than the relative tolerance.
Returned solution is not converged.
- Feature: Stationary Solver 1 (sol2/s1)
Can anyone tell me why when changing fluids my model wouldn't converge even though everything else is still the same? And what is the variable comp1.nitf.Pmfinl1?
Thank you
Hello Amr Daouk
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.
Please login with a confirmed email address before reporting spam