Foam::tmp<Foam::vector2DField> Foam::waveModels::solitary::velocity
(
const scalar t,
const scalar u,
const vector2DField& xz
) const
{
const scalar A = alpha(t);
const scalarField Z(max(scalar(0), 1 - mag(xz.component(1)/depth())));
const scalarField P(Pi(t, u, xz.component(0)));
return
celerity(t)
*zip
(
A/4
*(
(4 + 2*A - 6*A*sqr(Z))*P
+ (- 7*A + 9*A*sqr(Z))*sqr(P)
),
- A*Z*depth()*k(t)*tanh(parameter(t, u, xz.component(0)))
*(
(2 + A - A*sqr(Z))*P
+ (- 7*A + 3*A*sqr(Z))*sqr(P)
)
);
}
Foam::tmp<Foam::vectorField> Foam::waveSuperposition::velocity
(
const scalar t,
const vectorField& xyz
) const
{
vectorField result(xyz.size(), vector::zero);
forAll(waveModels_, wavei)
{
const vector2D d(cos(waveAngles_[wavei]), sin(waveAngles_[wavei]));
const vector2DField xz
(
zip
(
d & zip(xyz.component(0), xyz.component(1)),
tmp<scalarField>(xyz.component(2))
)
);
const vector2DField uw
(
waveModels_[wavei].velocity(t, xz)
);
result += zip
(
d.x()*uw.component(0),
d.y()*uw.component(0),
uw.component(1)
);
}
tmp<scalarField> s = scale(zip(xyz.component(0), xyz.component(1)));
return s*result;
}
Foam::tmp<Foam::scalarField> Foam::waveSuperposition::scale
(
const vector2DField& xy
) const
{
tmp<scalarField> tResult(new scalarField(xy.size(), 1));
scalarField& result = tResult.ref();
if (scale_.valid())
{
const scalarField x(xy.component(0));
forAll(result, i)
{
result[i] *= scale_->value(x[i]);
}
}
Foam::tmp<Foam::scalarField> Foam::waveSuperposition::elevation
(
const scalar t,
const vector2DField& xy
) const
{
scalarField result(xy.size(), 0);
forAll(waveModels_, wavei)
{
const vector2D d(cos(waveAngles_[wavei]), sin(waveAngles_[wavei]));
result += waveModels_[wavei].elevation(t, d & xy);
}
return scale(xy)*result;
}
