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-   -   How to understand "Y[inertIndex] = scalar(1) - Yt" in YEqn.H (https://www.cfd-online.com/Forums/openfoam-programming-development/123805-how-understand-y-inertindex-scalar-1-yt-yeqn-h.html)

 zqlhzx September 21, 2013 09:59

How to understand "Y[inertIndex] = scalar(1) - Yt" in YEqn.H

Hi Foamers:
As we can see the following codes in YEqn.H:

{
label inertIndex = -1;
volScalarField Yt(0.0*Y[0]);
forAll(Y, i)
{
if (Y[i].name() != inertSpecie)
{
volScalarField& Yi = Y[i];
solve
(
fvm::ddt(rho, Yi)
+ mvConvection->fvmDiv(phi, Yi)
- fvm::laplacian(turbulence->muEff(), Yi)
==
kappa*chemistry.RR(i),
mesh.solver("Yi")
);
Yi.max(0.0);
Yt += Yi;
}
else
{
inertIndex = i;
}
}
Y[inertIndex] = scalar(1) - Yt;
Y[inertIndex].max(0.0);
}
What does the "Y[inertIndex]"meas?How can I understand it?and what does the "Y[inertIndex]"use?

 Moslem September 22, 2013 04:55

I guess:
It is mass fraction of the inert species.
For example the N2 mass fraction in the following:
CH4+2(O2+3.76N2) --> CO2+2H2O+7.52N2

 zqlhzx September 22, 2013 06:40

Thanks Moslem,I think you are right!

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