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Old   August 30, 2005, 11:48
Default time step
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For steady state problem, it usually need to give a large time step at beginning and then gradually reduce that.

How about the time step for transient problems? Should I give a large or small number to start the solver?

Can someone share your experience?



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Old   August 31, 2005, 18:11
Default Re: time step
Robin K
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If the problem is stiff, then it is generally recommended that you start with a small time step, due to its instability issues at the start. But as the simulation progress, you could potentially increase the time step.

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Old   August 31, 2005, 20:08
Default Re: time step
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Thanks Robin.

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