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ENH: contactAngleForce: add optional contact-line movement force

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This commit is contained in:
Kutalmis Bercin 2022-12-06 11:52:55 +00:00 committed by Andrew Heather
parent 885456f9a4
commit 6f2c609a14
2 changed files with 33 additions and 4 deletions
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18
src/regionFaModels/liquidFilm/subModels/kinematic/force/contactAngleForces/contactAngleForce/contactAngleForce.C
View File

@ -62,6 +62,7 @@ contactAngleForce::contactAngleForce
:
force(typeName, film, dict),
Ccf_(coeffDict_.get<scalar>("Ccf")),
hCrit_(coeffDict_.getOrDefault<scalar>("hCrit", GREAT)),
mask_
(
IOobject
@ -113,15 +114,20 @@ tmp<faVectorMatrix> contactAngleForce::correct(areaVectorField& U)
const labelUList& nbr = film().regionMesh().neighbour();
const DimensionedField<scalar, areaMesh>& magSf = film().regionMesh().S();
const scalarField& magSff = magSf.field();
tmp<areaScalarField> talpha = film().alpha();
const areaScalarField& sigma = film().sigma();
const areaScalarField& mu = film().mu();
const areaScalarField& rhof = film().rho();
tmp<areaScalarField> ttheta = theta();
const areaScalarField& theta = ttheta();
const areaVectorField& Uf = film().Uf();
const areaScalarField& hf = film().h();
const areaVectorField gradAlpha(fac::grad(talpha()));
forAll(nbr, edgei)
@ -148,14 +154,20 @@ tmp<faVectorMatrix> contactAngleForce::correct(areaVectorField& U)
);
const scalar cosTheta = cos(degToRad(theta[facei]));
// (MHDX:Eq. 13)
force[facei] +=
Ccf_*n*sigma[facei]*(1 - cosTheta)/invDx/rhof[facei];
Ccf_*n*sigma[facei]*(1 - cosTheta)
/invDx/rhof[facei]/magSff[facei];
// (NDPC:Eq. 11)
if (hf[facei] > hCrit_)
{
force[facei] -= mu[facei]*Uf[facei]/hCrit_;
}
}
}
force /= magSf.field();
if (film().regionMesh().time().writeTime())
{
tForce().write();

19
src/regionFaModels/liquidFilm/subModels/kinematic/force/contactAngleForces/contactAngleForce/contactAngleForce.H
View File

@ -5,7 +5,7 @@
\\ / A nd | www.openfoam.com
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2020 OpenCFD Ltd.
Copyright (C) 2020-2022 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -32,6 +32,20 @@ Description
The effect of the contact angle force can be ignored over a specified
distance from patches.
Reference:
\verbatim
Governing equations (tag:MHDX):
Meredith, K. V., Heather, A., De Vries, J., & Xin, Y. (2011).
A numerical model for partially-wetted flow of thin liquid films.
Computational Methods in Multiphase Flow VI, 70, 239.
Contact line movement (tag:NDPC):
Novák, M., Devaradja, R., Papper, J., & Černý, M. (2020).
Efficient CFD methods for assessment of water management.
In 20. Internationales Stuttgarter Symposium (pp. 151-170).
Springer Vieweg, Wiesbaden.
\endverbatim
SourceFiles
contactAngleForce.C
@ -64,6 +78,9 @@ class contactAngleForce
//- Coefficient applied to the contact angle force
scalar Ccf_;
//- Critical film thickness [m]
scalar hCrit_;
//- Mask over which force is applied
areaScalarField mask_;