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given tolerances are satisfied.

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M R

M R

August 26, 2010 9:58am UTC

given tolerances are satisfied.

hello,

I did a transiant analysis for time 0 till 200e-6 seconds with step 0.1e-6 seconds and I apply a sinus boundry condition as:
sin(2*pi*102940*t)*(t<9.8e-6)( just one cycle with frequancy 102940 Hz which means 9.7144e-6 second period). But I encouter message:
Error:
Time 9.023674779079128e-006:
Failed to find time step so that given tolerances are satisfied.
Last time step is not converged.

could you please help me ?

Thanks

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Danial Tz

Danial Tz

August 26, 2010 11:16am UTC in response to M R

Re: given tolerances are satisfied.

Maybe your model doesn't like 0 as inlet velocity, or the change is too much that solver can not handle it. Usually it is the best to use a smoothed function (like step) to reduce the flow. Just some ideas.

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0 votes
M R

M R

August 26, 2010 12:25pm UTC in response to Danial Tz

Re: given tolerances are satisfied.

hello daniel,

If I want to create a delta pulse inested of a sinus wave how could I do that? I know how to create a pulse with heaviside but if I want to create a delta pulse how could I make it in comsol?

Thank you

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