[AhmadZ]

Hello all,

I am using interFoam to simulate falling liquid droplets onto a solid surface.
I am wondering if there is a possibility to add a mass source at some times, in the form of injected spherical liquid droplets, with specific diameter and velocity at a specific location.

I have tried with the attached fvOptions. It worked for the momentum but not for alpha. I am using of5 and of1712.

I got the following warning while running the case

From function virtual void Foam::fvption::checkApplied() const
in file cfdTools/general/fvOptions/fvOption.C at line 125
Source scalarSource defined for field alpha1 but never used

Any hint is highly appreciated.

[ashish.vinayak]

fvOptions if not defined in the alpha equation. Hence you are unable to use it.

[lumasci]

Originally Posted by ashish.vinayak

fvOptions if not defined in the alpha equation. Hence you are unable to use it.

OK, then can you tell how to define fvOptions in the alpha equation?

[ashish.vinayak]

Originally Posted by lumasci

OK, then can you tell how to define fvOptions in the alpha equation?

Hi Lumasci,

Well, you can't. fvOptions has not been initialized at all in the alphaEquation.
This means that, even if you define a fvOptionsDict for volScalarField alpha, it will not work.

You have two options in my opinion (I might be wrong, since my knowledge about this kind of source term is rather limited) -

1. Program a source term into the solver for the alpha equation
or
2. Add the source term to the MULES solver.

Note: I don't think either of these will be trivial tbh.

[lumasci]

Thanks for the reply. I am indeed trying to program a source term into the solver. Not an easy task.