[moz455]

Hi,
I appreciate if anyone can tell me what is the nuFric in JohnsonJackson boundary condition used in multiphase flow solvers? I cannot understand what the nuFric is subtracted from nu in JJ boundary condition?

// calculate the slip value fraction
scalarField c
(
constant::mathematical:: pi
*alpha
*gs0
*specularityCoefficient_.value()
*sqrt(3*Theta)
/max(6*(nu - nuFric)*alphaMax.value(), SMALL)
);

this->valueFraction() = c/(c + patch().deltaCoeffs());

partialSlipFvPatchVectorField::updateCoeffs();
}
Regards,
Mohsen