time step and iterations in steady state problem using transient solver

jing113cn · January 14, 2010, 05:08

I am using the transient solver for a steady state problem. Whether the time step and iterations per time step can effect the final results ? I want to know if I can use a large time step and 1 iteration per time step to reach the steady state.

herntan · January 14, 2010, 20:19

ur question answer can be vary from case to case.
If u understand what u trying to simulation, u should know how long it takes to have everything reach steady.
for example, u got a simulation which happen very fast and ended in 1second, u should try to set ur time step 0.1 sec or less to see what happen in that 1 second. as u can see, its depend on ur simulation.

Philipov · January 15, 2010, 03:18

Reach conversion criteria during iterations.... if the flow pattern does not change.... you can take this as a final solution

January 14, 2010, 05:08	time step and iterations in steady state problem using transient solver	#1
jing113cn New Member Join Date: Jun 2009 Posts: 22 Rep Power: 17	I am using the transient solver for a steady state problem. Whether the time step and iterations per time step can effect the final results ? I want to know if I can use a large time step and 1 iteration per time step to reach the steady state.

January 14, 2010, 20:19		#2
herntan Senior Member YH Tan Join Date: Mar 2009 Location: Malaysia Posts: 119 Rep Power: 18	ur question answer can be vary from case to case. If u understand what u trying to simulation, u should know how long it takes to have everything reach steady. for example, u got a simulation which happen very fast and ended in 1second, u should try to set ur time step 0.1 sec or less to see what happen in that 1 second. as u can see, its depend on ur simulation. __________________ Herntan, Add Reputation if I am right

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January 15, 2010, 03:18		#3
Philipov Senior Member Svetlin Filipov Join Date: Mar 2009 Location: United Kingdom Posts: 176 Rep Power: 18	Reach conversion criteria during iterations.... if the flow pattern does not change.... you can take this as a final solution