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-   -   convergence (http://www.cfd-online.com/Forums/fluent/40518-convergence.html)

novice April 10, 2006 15:21

convergence
 
is it necessary to converge the solution at each time step?

Joe April 10, 2006 15:34

Re: convergence
 
If you want to resolve any transient behavior, then yes.

novice April 10, 2006 17:49

Re: convergence
 
what do you meant by resolve any transient behavior?

Joe April 10, 2006 18:26

Re: convergence
 
Transient behavior as in time-varying behavior, such as what you would find in a bubble column or moderate Re flow past an obstacle in a channel etc. We know that these flow configurations exhibit time-varying behavior physically. For instance the periodic vortex shedding in the latter case etc. So if you want to accurately capture such phenomena, you stand a better chance if you converge in every time step. If all you are interested in is steady state solution, then you can safely march faster in time.


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