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

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 September 21, 2013, 09:59 How to understand "Y[inertIndex] = scalar(1) - Yt" in YEqn.H #1 Member   赵庆良 Join Date: Aug 2013 Posts: 56 Rep Power: 6 Sponsored Links 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? Thanks in advance!

 September 22, 2013, 04:55 #2 New Member   M. Sabouri Join Date: Nov 2011 Posts: 24 Rep Power: 7 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

 September 22, 2013, 06:40 #3 Member   赵庆良 Join Date: Aug 2013 Posts: 56 Rep Power: 6 Thanks Moslem,I think you are right!

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