[alpercftc]

This is my N2 initial conditions. But it's mass fraction. How can I get mole fraction on boundary condition instead of mass fraction?

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  9
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    format      ascii;
    class       volScalarField;
    location    "0";
    object      N2;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 0 0 0 0 0 0];

internalField  uniform 0.76162;

boundaryField
{
    inletfuel
    {
        type            fixedValue;
        value           uniform 0.74819;
    }
    inletair
    {
        type            fixedValue;
        value           uniform 0.76162;
    }
    outlet
    {
        type            inletOutlet;
        inletValue      uniform 0.76162;
        value           uniform 0.76162;
    }
    axis
    {
        type            empty;
    }
    leftside
    {
        type            zeroGradient;
    }
    burnerwall
    {
        type            zeroGradient;
    }
    burnertip
    {
        type            zeroGradient;
    }
    front
    {
        type            wedge;
    }
    back
    {
        type            wedge;
    }
}


// ************************************************************************* //