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Limitation in the number of answers in a time dependent model
Posted 29 janv. 2012, 23:03 UTC−5 Version 4.2 1 Reply
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I am running a time dependent simulation in the Rotating machinery-laminar flow module. I am using the BDF (Backwards differential formula) method. I am try to find the time in which the velocity of my model stabilizes. I ran three different simulations with a time step of 0.1 during 5 s, 10 s and 20s . However, I am obtaining the same answers for the three models, because COMSOL is giving me just the first 50 time step solutions, which means the answers for the first 5 seconds.
Is there something should I modify in COMSOL to obtain more data, or does it mean that after 5 seconds the model is stable and for this reason COMSOL is not giving me any more solutions?
Is there something should I modify in COMSOL to obtain more data, or does it mean that after 5 seconds the model is stable and for this reason COMSOL is not giving me any more solutions?
1 Reply Last Post 30 janv. 2012, 01:23 UTC−5
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Posted:
1 decade ago
Hi
read carefully the doc about the time stepping solver, and try time step "intermediate or strict in the time stepping tab of your transient solver sub-node
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Good luck
Ivar
read carefully the doc about the time stepping solver, and try time step "intermediate or strict in the time stepping tab of your transient solver sub-node
--
Good luck
Ivar