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How to resolve this error

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Dear Sir,
when I modeled a small specimen in a fluid inside the cavity of microwave oven, I got the following error:
Time dependent Solver (sol/t1)
Failed to find consistent initial values
undefined or Inf found when solving linear system solver using SOR
Last step is not converged

Would someone help me how to fix the error.
Thanks,
Iman Hassaballa

1 Reply Last Post 2011年1月17日 GMT-5 00:45
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago 2011年1月17日 GMT-5 00:45
Hi

it can be a few thinks , I believe, but by default the initial values are all set to "0" this is often quite far from the results, so often it's wiser to estimate what are about the results, and set up the initial conditions accordingly. I agree for complex geometries its rather difficult, so its a question of testing it out.
Then it couldbe that you are missing some BC (boundary conditions) or that some are contradictory

--
Good luck
Ivar
Hi it can be a few thinks , I believe, but by default the initial values are all set to "0" this is often quite far from the results, so often it's wiser to estimate what are about the results, and set up the initial conditions accordingly. I agree for complex geometries its rather difficult, so its a question of testing it out. Then it couldbe that you are missing some BC (boundary conditions) or that some are contradictory -- Good luck Ivar

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