[Rachel0096]

Hello,everyone!
I am now trying to add the species mass fraction equation to compressibleInterFoam, but since I have less programming experience, I am not sure if this is correct?

tmp<fv::convectionScheme<scalar>> mvConvection
(
    fv::convectionScheme<scalar>::New
    (
        mesh,
        fields,
        alpha2rho2phi,
        mesh.divScheme("div(alpha2rho2phi,Yi)")
    )
);
{
    combustion->correct();
    Qdot = combustion->Qdot();
    volScalarField Yt(0.0*Y[0]);
    volScalarField alpha2muEff("alpha2muEff" , alpha2*turbulence.muEff());

    forAll(Y, i)
    {
        if (i != inertIndex && composition.active(i))
        {
            volScalarField& Yi = Y[i];
            fvScalarMatrix YEqn
            (
                fvm::ddt(alpha2rho2, Yi)
              + mvConvection->fvmDiv(alpha2rho2phi, Yi)
              - fvm::laplacian(alpha2muEff, Yi)
             ==
                parcels.SYi(i, Yi)
              + combustion->R(Yi)
              + fvOptions(rho, Yi)
            );

            YEqn.relax();

            fvOptions.constrain(YEqn);

            YEqn.solve(mesh.solver("Yi"));

            fvOptions.correct(Yi);

            Yi.max(0.0);
            Yt += Yi;
        }
    }

    Y[inertIndex] = scalar(1) - Yt;
    Y[inertIndex].max(0.0);

Variables,such as alpha2rho2phi and alpha2rho2 are defined in createField.H.

volScalarField alpha2rho2
(
   IOobject
   (
       "alpha2rho2",
       runTime.timeName(),
       mesh,
       IOobject::READ_IF_PRESENT,
       IOobject::AUTO_WRITE
   ),
   alpha2*rho2
);

 surfaceScalarField alpha2rho2phi
 (
     IOobject
     (
         "alpha2phi",
         runTime.timeName(),
         mesh,
         IOobject::READ_IF_PRESENT,
         IOobject::AUTO_WRITE
     ),
     linearInterpolate(alpha2*rho2*U) & mesh.Sf()
 );

Is this correct?Besides,What does mvconvection stand for?