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(es), (smsld), (ale) Error: Matrix has zero on diagonal.
Posted 07.12.2010, 01:55 GMT-5 1 Reply
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So I'm using a Parametric segregated solver in version 3.5a with the following three 'coupled' applications:
electrostatics
solid, stress-strain
moving mesh
And I have been recommended to use the following segregated groups with liner solvers in my Solver Parameters dialog box:
1) V solver: Conjugate gradients, Preconditioner: Algebraic multigrid
2) u v w solver: Direct (SPOOLES)
3) x y z solver: Direct (SPOOLES)
The electrostatics and solid, stress-strain applications solve smoothly, up to 45 Volts as desired, however, I immediately receive an error when attempting to solve the moving mesh application:
Segregated group X1
Matrix has zero on diagonal.
Any advice? I've been reading the COMSOL help desk and searching through comsol.com for help on matricies and 'zeros' on diagonals, but it seems very complicated and without thorough explanation (from the beginning, that is). I've tried using some different linear solvers and preconditioners, but there are just so many combinations and none of them have worked so far.
I've uploaded my model.
Thanks in advance.
Best regards,
Kevin
Hello Kevin Myhro
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Thanks for your post. It was very helpfull to me.
Best regards,
Thor