time taken to update solution in unsteady flow
 

Hi, I am running an unsteady simulation, the interations are running at a acceptable rate however it takes a very long time to update the solution. Is there anything i need to do to speed this up? is it possible i may be trying to update a solution over the network? what is the file that fluent is updating?

Re: time taken to update solution in unsteady flow
 

Dear phil:

are you writing a lot of .out files ? monitors ?

if so, if you are doing it per iteration, that might be the culprit -- just a wild guess.

Re: time taken to update solution in unsteady flow
 

thanks for the reply but unfortunately its definately not that, i have no monitors of any time and the iterations are progressing well it just takes a lot of time to update the solution at the end of every timestep

Re: time taken to update solution in unsteady flow
 

are you writing to network drive or local drive? try local - that may give you better results.

Re: time taken to update solution in unsteady flow
 

Hi best thing to improve the convergence rat is just increase underrelaxation factors(ideally to 1) .. kethireddy... rwth-aachen.. Germany

Re: time taken to update solution in unsteady flow
 

Are you using VOF model? If so, that should be the reason of long updating time because of the VOF sub-time steps.

Re: time taken to update solution in unsteady flow
 

yes it is VOF