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error 6177
Posted 2010/03/24 10:30 GMT-4 3 Replies
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I want to see eddy current in a metal by magnetic field of an AC voltage coil in 1MHz frequency in time harmonic mode but Comsol gives me Error:6177 (matrix has zero on diagonal. )
What can I do to solve this problem???
Thanks,
Hello Saber Behkami
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If so kindly let me know.
I am also getting the same problem
-Nagesh..
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When the equations have a structure such that the stiffness matrix (Jacobian matrix) has zeros on the diagonal, it is not possible to use the following linear system solvers/ preconditioners/smoothers: all versions of SOR and Diagonal scaling (Jacobi). Try the Vanka preconditioner/smoother instead.
or a direct solver, if possible.
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I am also trying to simulate a similar case, wherein i want to observe eddy current in a metal, But when i use time harmonic mode, i am getting the same error. I have tried the GMRES-Vanka or GMRES-GMG and also the drect solvers but no success.
If anybody has been able to overcome this problem, kindly advise.