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Error-System matrix is zero

Posted 21 juin 2012, 22:08 UTC+2 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 9 sept. 2013, 11:56 UTC+2
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 22 juin 2012, 11:04 UTC+2
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 3 juil. 2012, 00:20 UTC+2
Thank you.
Thank you.
Xu Li
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Posted: 1 decade ago 29 mars 2013, 03:36 UTC+1
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 29 mars 2013, 08:43 UTC+1
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 9 sept. 2013, 11:56 UTC+2
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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