/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright held by original author
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 2 of the License, or (at your
    option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM; if not, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Description
    Set inital film thickness for droplet spreading case.

\*---------------------------------------------------------------------------*/

#include "fvCFD.H"
#include "faCFD.H"

using namespace Foam;

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

int main(int argc, char *argv[])
{
#   include "setRootCase.H"
#   include "createTime.H"
#   include "createMesh.H"
#   include "createFaMesh.H"
#   include "readTransportProperties.H"

    Info << "Reading field h" << endl;
    areaScalarField h
    (
        IOobject
        (
            "h",
            runTime.timeName(),
            mesh,
            IOobject::MUST_READ,
            IOobject::AUTO_WRITE
        ),
        aMesh
    );
    
    scalar D = 0.000038;
    scalar A = 0.0014;
    scalar R = (sqr(A) + sqr(D))/(2*D);

    Info << "Spherical cap radius: " << R << " m" << endl;

    scalarField& hI = h.internalField();

    const vectorField& Cf = aMesh.areaCentres().internalField();

    scalarField a = sqrt
    (
        sqr(Cf.component(vector::X))
      + sqr(Cf.component(vector::Y))
    );

    hI = pos(A - a)*(sqrt(sqr(R) - sqr(a)) - (R - D))
       + neg(A - a)*h0.value();

    h.write();

    Info<< "\nEnd" << endl;

    return 0;
}


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