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Error-System matrix is zero

Posted 2012年6月21日 GMT-4 16:08 5 Replies

Jitendra Loganathan
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Failed to find a solution.
System matrix is zero.
Returned solution is not converged.

Can anyone please explain me about this error?
5 Replies Last Post 2013年9月9日 GMT-4 05:56
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2012年6月22日 GMT-4 05:04
Hi

most often it is because you are missing A BC or you have not fully defined the solution. Particularly, when you have many physics, you need enough BC for ALL physics independently. else the solution is not unique.

--
Good luck
Ivar
Hi most often it is because you are missing A BC or you have not fully defined the solution. Particularly, when you have many physics, you need enough BC for ALL physics independently. else the solution is not unique. -- Good luck Ivar
Jitendra Loganathan
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Posted: 1 decade ago 2012年7月2日 GMT-4 18:20
Thank you.
Thank you.
Xu Li
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Posted: 1 decade ago 2013年3月28日 GMT-4 22:36
Could you please tell me what A,B and C stand for? Thank you very much~
Could you please tell me what A,B and C stand for? Thank you very much~
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2013年3月29日 GMT-4 03:43
Hi

Sorry, I was typing to quick ;)

I intended to write "...a BC (Boundary Condition) ..."

--
Good luck
Ivar
Hi Sorry, I was typing to quick ;) I intended to write "...a BC (Boundary Condition) ..." -- Good luck Ivar
Ayan Roy Choudhury
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Posted: 1 decade ago 2013年9月9日 GMT-4 05:56
Sir
I am doing a coiled heat exchanger problem, I have defined all the boundary conditions-viz- temperature, fluid velocity, material properties but still this error ocuurs. Tell me how can I rectify this.

Sir I am doing a coiled heat exchanger problem, I have defined all the boundary conditions-viz- temperature, fluid velocity, material properties but still this error ocuurs. Tell me how can I rectify this.

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