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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2017-2023 OpenFOAM Foundation
\\/ 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 3 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, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
#include "Stokes2.H"
#include "addToRunTimeSelectionTable.H"
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
namespace Foam
{
namespace waveModels
{
defineTypeNameAndDebug(Stokes2, 0);
addToRunTimeSelectionTable(waveModel, Stokes2, dictionary);
}
}
// * * * * * * * * * * Static Protected Member Functions * * * * * * ** * * //
Foam::scalar Foam::waveModels::Stokes2::celerity(const AiryCoeffs& coeffs)
{
static const scalar kdGreat = log(great);
const scalar kd = min(max(coeffs.k()*coeffs.depth, - kdGreat), kdGreat);
const scalar ka = coeffs.k()*coeffs.amplitude;
const scalar S = coeffs.deep() ? 0 : 1/cosh(2*kd);
const scalar C0 = coeffs.celerity();
const scalar C2ByC0 = (2 + 7*sqr(S))/4/sqr(1 - S);
if (debug)
{
Info<< "C2 = " << C2ByC0*C0 << endl;
}
return Airy::celerity(coeffs) + sqr(ka)*C2ByC0*C0;
}
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::waveModels::Stokes2::Stokes2
(
const dictionary& dict,
const scalar g,
const word& modelName,
scalar (*celerityPtr)(const AiryCoeffs&)
)
:
Airy(dict, g, modelName, celerityPtr)
{}
// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
Foam::waveModels::Stokes2::~Stokes2()
{}
// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
Foam::scalar Foam::waveModels::Stokes2::celerity() const
{
return celerity(coeffs());
}
Foam::tmp<Foam::scalarField> Foam::waveModels::Stokes2::elevation
(
const scalar t,
const scalarField& x
) const
{
const AiryCoeffs coeffs = this->coeffs();
static const scalar kdGreat = log(great);
const scalar kd = min(max(coeffs.k()*depth(), - kdGreat), kdGreat);
const scalar ka = coeffs.k()*amplitude(t);
const scalar T = coeffs.deep() ? 1 : tanh(kd);
const scalar B22 = (3/sqr(T) - 1)/T/4;
if (debug)
{
Info<< "B22 = " << B22 << endl;
}
return
Airy::elevation(t, x)
+ (1/coeffs.k())*sqr(ka)*B22*cos(2*coeffs.angle(phase(), t, x));
}
Foam::tmp<Foam::vector2DField> Foam::waveModels::Stokes2::velocity
(
const scalar t,
const vector2DField& xz
) const
{
const AiryCoeffs coeffs = this->coeffs();
static const scalar kdGreat = log(great);
const scalar kd = min(max(coeffs.k()*depth(), - kdGreat), kdGreat);
const scalar ka = coeffs.k()*amplitude(t);
const scalar A22ByA11 = coeffs.deep() ? 0 : 0.375/pow3(sinh(kd));
if (debug)
{
const scalar A11 = 1/sinh(kd);
Info<< "A22 = " << A22ByA11*A11 << endl;
}
return
Airy::velocity(t, xz)
+ Airy::celerity()*sqr(ka)*A22ByA11*coeffs.vi(2, phase(), t, xz);
}
// ************************************************************************* //
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