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interFoam - different results compared to others in a micro T-junction

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Old   April 4, 2021, 11:57
Default interFoam - different results compared to others in a micro T-junction
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Maryam Fatehifar
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Hi all,
I am struggling with not getting similar results compared to results reported by others in papers. I have tried simulating 4-5 T junction cases and I use the exact values for parameters and velocities reported in papers, yet the results are very different...
Can you please help me find what I am doing wrong?
I should be getting nice droplets formed in the channel, yet I get two flows moving parallel to each other

btw, my simulation is 2D in OpenFoam 8.

In fvSolution I have:

"alpha.oil.*"
{
nAlphaCorr 3;
nAlphaSubCycles 3;
cAlpha 0.75;

MULESCorr yes;
nLimiterIter 5;

solver smoothSolver;
smoother symGaussSeidel;
tolerance 1e-8;
relTol 0;
}
.
.
.
PIMPLE
{
momentumPredictor yes;
nOuterCorrectors 1;
nCorrectors 3;
nNonOrthogonalCorrectors 1;
}

I have checked small courant numbers, different grad schemes, different calpha (0.5-2), Mules nLimiterIter (3-15), different number of PIMPLE corrector (2-5) and non-orthogonal corrector (0-2) and nothing has helped me get the results I am supposed to get.

Can you help me please? I really need to figure this out for my PhD.

Many thanks.
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File Type: jpg my_result.jpg (26.3 KB, 13 views)
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Old   July 28, 2023, 15:13
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Santhosh
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Hello Mary,



You posted the thread a while ago but your subject is really close to my research. I am simulating two phase flow in micro T-junction too and using interFoam. By mimicking experimental conditions, I manage to get emulsion of the same length/shape as my experiments but not the same mean velocity or periodic generation. Did you encounter those difficulties as well ? Or do you have any advice/hints ?


Thanks for your time!


Sincerely,
Santhosh
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droplet microfluidics, interfoam, t-junction

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