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Error in parametric sweep simulation

Posted May 4, 2012, 3:58 p.m. EDT Heat Transfer & Phase Change, Studies & Solvers Version 4.2a 2 Replies

Emanuel Benatti
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Hi,

I'm trying to run a joule heating simulation on a wire that is on a sapphire substrate. The wire has a hot spot in the middle and current is flowing threw it. My idea is to determine how long takes the system to thermally relax. I'm running a parametric sweep changing the thick of the wire, but when I compute the solution I get this error message:

Error in sweep: The following feature has encoutered a problem:

The following feature has encoutered a problem:
Extrude requires distances to be distinct.
Error in multiphysics compilation.
-Feature: Compile equations: Time dependent (sol1/st1)
-Error:Extrude requires distances to be distinct.

I've checked the busbar example in the tutorials and I can't find any differences between the example and my simulation.

I'm attaching the file I'm using

Thanks

Emanuel
2 Replies Last Post May 8, 2012, 12:36 p.m. EDT
Jim Freels mechanical side of nuclear engineering, multiphysics analysis, COMSOL specialist
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Posted: 1 decade ago May 5, 2012, 11:08 p.m. EDT
It sounds like your parameter change must have also effected the geometry or mesh in a manner that does not allow the embedded extrude to complete. Extrude will only occur in a geometry or mesh portion of the tree. You should be able to see the error in down the model tree. Look under geometry and/or mesh to find it.

It sounds like your parameter change must have also effected the geometry or mesh in a manner that does not allow the embedded extrude to complete. Extrude will only occur in a geometry or mesh portion of the tree. You should be able to see the error in down the model tree. Look under geometry and/or mesh to find it.
Emanuel Benatti
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Posted: 1 decade ago May 8, 2012, 12:36 p.m. EDT
Hi, thanks for the aswer

you were right mi problem is that the mesh gets coarser while my parametrer was changing. I manually adjusted the element size and the problem got solved.

Regards,
Emanuel
Hi, thanks for the aswer you were right mi problem is that the mesh gets coarser while my parametrer was changing. I manually adjusted the element size and the problem got solved. Regards, Emanuel

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