[d3co]

Hello,
So im currently doing a VOF (multiphase) simulation with water and air and my geometry has 3 inlets.

Is there a way to make each inlet "open" and start water flow at different times?

for example, at time 0 start with the inlet on the center, and after 100 sec close it and start with the other 2 inlets on the sides.


Regards

[al.csc]

Heave you tried a simple solution like https://www.openfoam.com/documentati...xed-value.html ?

For example, for the volume fraction (and accordingly all the other variables and patches):

inlet_main
{
type uniformFixedValue;
uniformValue table
(
(0 1)
(100 1)
(100.1 0)
);
}

[d3co]

Hi,

thanks for your answer, yes i have, but from what i understand (i could be wrong though) when i put something like:


uniformValue table
(
(0 (0 0 0)
(100 (0 1 0)
);
}
to start flow on the second inlet at 100 sec, the flow starts at 0 U but very slow till it gets to 1. It is taking a lot of time to simulate.

[al.csc]

I made the example for alpha.
If you talk about velocity:

uniformValue table
(
(0 (0 1 0) // open
(100 (0 1 0) // start closing
(100.1 (0 0 0) //close
);

Of course, also the other variables need to be changed accordingly.

100 s is a very long physical time, I am not surprised it takes time. Depending on what you want to get, you may consider Co = 10 and multiple PIMPLE loop.

Cheers

[d3co]

Hi,
Thank you, im going to try that, what do you mean by Co=10 and multiple PIMPLE loop, is that in fvSolution?