Using convergence manager for Transient simulation

lma80 · March 1, 2017, 11:02

Hi all

I am new in using fluent transient simulation.

I tried to use convergence conditions on the solution that are
based on the values from surface, such as velocity at specific point, to achieve the convergence at each time step and move on to the next step but I could not do that.
I appreciate your help !

LuckyTran · March 1, 2017, 16:34

The convergence monitor doesn't work that way for transient simulations.

For transient simulations it's checking the solution vs time-step, it's meant to be used for checking if you have achieved steady-state. You can't use it to check convergence within a time-step.

Unfortunately such a feature doesn't exist in Fluent built-in.

lma80 · March 1, 2017, 20:14

thanks for your reply.

Is there a chance to do this by using UDF?

regards,

Kantt · February 19, 2018, 06:13

Hi lma80,

Did you achieve to do that? I need to do it also.

Thank you in advance for your reply.

Kant

March 1, 2017, 11:02	Using convergence manager for Transient simulation	#1
lma80 New Member Layth Join Date: Mar 2016 Posts: 5 Rep Power: 10	Hi all I am new in using fluent transient simulation. I tried to use convergence conditions on the solution that are based on the values from surface, such as velocity at specific point, to achieve the convergence at each time step and move on to the next step but I could not do that. I appreciate your help !

March 1, 2017, 16:34		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,764 Rep Power: 66	The convergence monitor doesn't work that way for transient simulations. For transient simulations it's checking the solution vs time-step, it's meant to be used for checking if you have achieved steady-state. You can't use it to check convergence within a time-step. Unfortunately such a feature doesn't exist in Fluent built-in. lma80 likes this.

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March 1, 2017, 20:14		#3
lma80 New Member Layth Join Date: Mar 2016 Posts: 5 Rep Power: 10	thanks for your reply. Is there a chance to do this by using UDF? regards,

February 19, 2018, 06:13		#4
Kantt New Member Join Date: Feb 2018 Posts: 1 Rep Power: 0	Hi lma80, Did you achieve to do that? I need to do it also. Thank you in advance for your reply. Kant