[Memorise]

Hello everyone,
I’m performing aeroacoustics transient solver with local time step or two physical time. The process of the simulation is showed as following:
1）UEqn.H 2）pEqn.H （which is same as the pisoFoam and the two is controlled by larger time step T_flow）
3) aco.H : the aco.H reads some information from the flow field and doesn’t return results to the flow field. In this process, the time step of aco.H, I hope, is 10 times smaller of T_flow(T_aco = 0.1T_flow) and the value “10 times” is the fixed value that I can input.
Therefore, my problems is how to implement it T_T and I have no clues on it. To be more detailed, how to perform time-control in OpenFOAM ?
Thank you very much if you can give me a hand!

[Tobi]

Hey,

simply spoken:

• use pisoFoam and add your acoustic.eqn there
• Make some condition on the whole piso code that is only evaluated each x-th time-step

    if (runTime.value() % 10 == 0)
    {

        // Execute all from pisoFoam
     }

     acoustic.eqn;

This will simply execute the pEqn and UEqn each 10th time-step. Note that this code is just for demonstration purposes.

Cheers.

[Memorise]

Hello Tobi,
I'm grateful to your helping and it works very well
Best wishse!
Memorise