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Time at which the steady state solution has been reached

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Hi,

I'm working on a model composite by the physics "magnetic field, no currents" and "pde".
I have done 2 different solution, one "time-dipendent", and the other "steady state solution". The two solutions have compatible trend, but I can't find, in the COMSOL options, the exact time at which the "steady-state" has been reached by the phenomenon.
How can I do?

Thanks in advance,
Fabio

1 Reply Last Post 2012年4月24日 GMT-4 09:49

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Posted: 1 decade ago 2012年4月24日 GMT-4 09:49
Hi

the steady state analysis doesn't tell anything about time. You must look at the results of the time-dependant analysis. In many cases you find something like an asymptotic behavior and you can try to extract a time constant from it.
I don't think COMSOL can provide this automatically and the meaning of a steady-state condition is subject to definition. At which degree of approximation do we talk of steady-state, 90%, 99%, ... You must decide by yourself.

Cheers
Edgar
Hi the steady state analysis doesn't tell anything about time. You must look at the results of the time-dependant analysis. In many cases you find something like an asymptotic behavior and you can try to extract a time constant from it. I don't think COMSOL can provide this automatically and the meaning of a steady-state condition is subject to definition. At which degree of approximation do we talk of steady-state, 90%, 99%, ... You must decide by yourself. Cheers Edgar

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