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Info<< "Reading combustion properties\n" << endl;
IOdictionary engineGeometry
(
IOobject
(
"engineGeometry",
runTime.constant(),
mesh,
IOobject::MUST_READ_IF_MODIFIED,
IOobject::NO_WRITE
)
);
vector swirlAxis
(
engineGeometry.lookup("swirlAxis")
);
vector swirlCenter
(
engineGeometry.lookup("swirlCenter")
);
dimensionedScalar swirlRPMRatio
(
engineGeometry.lookup("swirlRPMRatio")
);
dimensionedScalar swirlProfile
(
engineGeometry.lookup("swirlProfile")
);
dimensionedScalar bore
(
engineGeometry.lookup("bore")
);
dimensionedScalar rpm
(
engineGeometry.lookup("rpm")
);
Info<< "Reading field U\n" << endl;
volVectorField U
(
IOobject
(
"U",
runTime.timeName(),
mesh,
IOobject::MUST_READ,
IOobject::AUTO_WRITE
),
mesh
);
vector zT = swirlAxis;
vector yT = vector(0, zT.z(), -zT.y());
vector xT = vector
(
zT.y()*zT.y() + zT.z()*zT.z(),
-zT.x()*zT.y(),
-zT.x()*zT.z()
);
// if swirl is around (1, 0, 0) we have to find another transformation
if (mag(yT) < SMALL)
{
yT = vector(zT.y(), -zT.x(), 0);
xT = vector(-zT.x()*zT.z(), -zT.y()*zT.z(), zT.x()*zT.x() + zT.y()*zT.y());
}
//swirlAxis doesn't have to be of unit length.
xT /= mag(xT);
yT /= mag(yT);
zT /= mag(zT);
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