Learning Forum

[rasunag27]

Dear All,

       I ran a 3D wing simulation in fluent which took around 8 hours to stabilize the solution. I initially gave for 10000 Iterations and the solution converged at 7000 Iterations. Now, with change in AoA, I am running a parametric study for different cases. I would like to know how much time does it take for each parametric study to obtain the result.

1. Is the time taken same as the original study case i.e. 8 hours? Also, will it take the complete 10000 Iterations?

2. Is the time takes less than the original study case?

 

Thanks and Regards,

Sunag R A.

[DrAmine]

This is not predictable as other AoA is a new flow configuration but you can expect that it could be of similar expense. What I recommend here especially for similar AoA is to initialize current DP'S from previous calculated. Saying that keep the settings for DP initialization in the Workbench as default. I generally do not recommend that but as your pain is the calculation time please keep that as default!

[rasunag27]

Thank you very much for your response @abenhadj. I have given change in velocity input parameters in Fluent. Once the default simulation is done, I went for parametric study for change in velocity in x and y components. I understood that change in velocity leads to new configuration. So, what do you mean by "Keep the settings as default for DP initialization in workbench"?. Could you please explain more elaborately. 

 

Thanks

[Rob]

There are a few options to initialise the solution during parametric runs: some can help, some hinder depending on the situation. Amine's suggesting leaving the default settings alone rather than altering them. 

Which solver and version are you using?

[rasunag27]

Hi rwoolhou,

 Thank you for your reply. I am using Fluent solver with Ansys version 18.1.

[DrAmine]

Please update if possible to the most actual version