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Failed to find a solution. There are 1 void equations
Posted 10 ago 2014, 22:38 GMT-4 Fluid & Heat, Heat Transfer & Phase Change, Heat Transfer Version 5.2a 1 Reply
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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
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