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-   -   Completed all coefficient loops in transient iteration (https://www.cfd-online.com/Forums/cfx/221464-completed-all-coefficient-loops-transient-iteration.html)

RAJDEEP October 17, 2019 13:20

Completed all coefficient loops in transient iteration
 
Hello,
I am newbie to CFX. while carrying out transient simulation, all coefficient loops (30) are getting finished for initial iterations in transient simulation.

I want to know that, will it create any incorrect transient result at that particular iteration?

And any tutorial or material regarding coefficient loops in CFX. What it is actually meant for it.

ghorrocks October 17, 2019 17:40

It means those time steps did not achieve your convergence criteria, so are potentially less accurate than fully converged time steps. But whether this matters depends on what you are doing. If you need to resolve the start up transient accurately then you better fix it so they fully converge. If the initial startup transient is not important then it can be ignored.

Carlo_P October 18, 2019 02:56

That sounds strange..
maybe you didn't initialize it correctly.
Try to run a steady simulation with the initial value, in order to have a correct starting situation.
Normally, the coefficient loops should be around 7-10.


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