Large and Small Time-steps

Natali_Beginner · May 3, 2013, 16:51

Hello everyone,
I am simulating a transient case and I compare 2 different time-steps sizes, 0.001 s and 0.01 s.
However, after 20 time steps with 0.001 s, the results of a benchmark is X. But, I reach to X with larger time-step (0.01 s) after 10 time-steps.
In fact, the result is X but at different times.
Why that happens?
Am I doing something incorrect?
Thanks to read my post,
Natali

Natali_Beginner · May 3, 2013, 17:23

I wanna answer to myself

I think it shows that the time-step size that I selected is not correct. Am I right?
If so, how can i select an appropriate time-step size?

May 3, 2013, 16:51	Large and Small Time-steps	#1
Natali_Beginner New Member Natali Join Date: Apr 2013 Posts: 21 Rep Power: 14	Hello everyone, I am simulating a transient case and I compare 2 different time-steps sizes, 0.001 s and 0.01 s. However, after 20 time steps with 0.001 s, the results of a benchmark is X. But, I reach to X with larger time-step (0.01 s) after 10 time-steps. In fact, the result is X but at different times. Why that happens? Am I doing something incorrect? Thanks to read my post, Natali

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May 3, 2013, 17:23		#2
Natali_Beginner New Member Natali Join Date: Apr 2013 Posts: 21 Rep Power: 14	I wanna answer to myself I think it shows that the time-step size that I selected is not correct. Am I right? If so, how can i select an appropriate time-step size?