[TomWaits]

I am using runTimeControl in my controlDict to stop my simpleFoam (steady-state) simulation when certain criteria are reached. However, I want simpleFoam to run at least 100 iterations (time-steps) before stopping. For some runs, the convergence criteria in runTimeControl finish before 100 iterations.

Is there a way to set the minimum number of time-steps/iterations or have a criteria where the solution is not converged if the number of iterations is less than 100?

Many thanks,
Tom Waits

[Tobermory]

No built-in way, Tom, but you can do it simply as follows:
1. run for 100 iterations without setting any convergence criteria;
2. restart and run with convergence criteria active.

You could automate it in your Allrun script, if you're lazy like me - I would generate two versions of controlDict (eg controlDict.v1 and controlDict.v2) and two versions of fvSolution, each with the correct setup for runs 1 & 2, and use the Allrun script to copy the relevant version into the system folder for each run.

[Yann]

Hello Tom,

Since you are already using the runTimeControl function object, you could just use the timeStart parameter to start your function object from the 100th iteration.
https://doc.openfoam.com/2306/tools/...ction-objects/

Regards,
Yann