[sm0226]

Hi everyone.

I am simulating the flow of flames by a fan.
I want the fan to run for only a few seconds, how can I slow down the angular velocity(omega) or set it to only rotate for a fixed time?

Below is the contents of my MRFProperties file.

MRF1
{
cellZone rotatingZone;
active yes;

origin (-4.294 0 0);
axis (0 0 1);
omega constant -74.874;
}

[Krao]

Hi Sangmin,

Since changing the properties of constant doesn't come to effect during the simulation, how about doing the simulation with fan for some time(iterations) and stop the simulation at writenow, and change the velocity to zero in constant/MRFProperties and continue from latestTime. I am not sure whether it gives you the perfect answer, you are looking for. If you don't want to change manually use ./allRun kind of scripts.

Cheers,
Krao

[sm0226]

Dear Kmeti Rao

Thank you for your kind answers and advice.

I think that is great idea. I just try it now!