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Time at which the steady state solution has been reached
Posted Apr 24, 2012, 5:53 a.m. EDT Results & Visualization Version 4.2a 1 Reply
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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
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 Apr 24, 2012, 9:49 a.m. EDT
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Posted:
1 decade ago
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
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