[Merlinizlf]

Hello everyone,
I am a new foamer. Iam using the OpenFOAM6.
Recently, I try to add fvOptions(alpha1) into the alphaDiffusionEqn in the twoLiquidMixingFoam, the following error was showed when I wmake:

alphaDiffusionEqn.H: In function ‘int main(int, char**)’:
alphaDiffusionEqn.H:11:10: error: ‘fvOptions’ was not declared in this scope
== fvOptions(alpha1)//add
^~~~~~~~~
alphaDiffusionEqn.H:11:10: note: suggested alternative: ‘fvOption_H’
== fvOptions(alpha1)//add
^~~~~~~~~
fvOption_H

However, I added the fvOptions.H in the file my_twoLiquidMixingFoam.C at the beginning. As following:

#include "pimpleControl.H"
#include "fvOptions.H"//add this



The file alphaDiffusionEqn.H I changed is showed as follows:


fvScalarMatrix alpha1Eqn
(
fvm::ddt(alpha1)
- fvc::ddt(alpha1)
- fvm::laplacian
(
volScalarField("Dab", Dab + alphatab*turbulence->nut()),
alpha1
)
== fvOptions(alpha1)//add
);

fvOptions.constrain(alpha1Eqn);//add this
alpha1Eqn.solve();
fvOptions.correct(alpha1);

alpha2 = 1.0 - alpha1;
rhoPhi += alpha1Eqn.flux()*(rho1 - rho2);
}

rho = alpha1*rho1 + alpha2*rho2;

Any suggestions and commons are very welcome

Thank you
Best Regards