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Timestep in transient flow

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Old   March 10, 2004, 08:00
Default Timestep in transient flow
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Zaher
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Hi all, How can I compute the timestep in transient flow?? thanx
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Old   March 10, 2004, 16:47
Default Re: Timestep in transient flow
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Glenn Horrocks
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Hi Zaher,

Do a timestep independance study. Choose a sensible sounding starting point, do a simulation, get an answer. Rerun with half the timestep. If the answer is the same you should be timestep independant. If different then rerun with the timestep halved again. Keep repeating and halving the timestep until you get the same answer.

Glenn
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Old   March 13, 2004, 02:48
Default Re: Timestep in transient flow
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Zaher
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Thanx
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