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Setting Mass source in interFoam

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Old   June 11, 2018, 23:01
Default Setting Mass source in interFoam
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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.
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File Type: gz fvOptions.gz (537 Bytes, 31 views)
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Old   October 24, 2018, 10:14
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Ashish Vinayak
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fvOptions if not defined in the alpha equation. Hence you are unable to use it.
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Old   May 28, 2019, 13:38
Cool define fvOptions in interFoam
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Ludo Masci
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Quote:
Originally Posted by ashish.vinayak View Post
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?
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Old   May 28, 2019, 14:03
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Quote:
Originally Posted by lumasci View Post
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.
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Old   May 29, 2019, 04:02
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Thanks for the reply. I am indeed trying to program a source term into the solver. Not an easy task.
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