Q.C

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#include "Q.H"
#include "fvcGrad.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionObjects
{
    defineTypeNameAndDebug(Q, 0);
 
    addToRunTimeSelectionTable
    (
        functionObject,
        Q,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
bool Foam::functionObjects::Q::calc()
{
    if (foundObject<volVectorField>(fieldName_))
    {
        const volVectorField& U = lookupObject<volVectorField>(fieldName_);
        const tmp<volTensorField> tgradU(fvc::grad(U));
        const volTensorField& gradU = tgradU();
 
        return store
        (
            resultName_,
            0.5*(sqr(tr(gradU)) - tr(((gradU) & (gradU))))
        );
    }
    else
    {
        cannotFindObject<volVectorField>(fieldName_);
 
        return false;
    }
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::functionObjects::Q::Q
(
    const word& name,
    const Time& runTime,
    const dictionary& dict
)
:
    fieldExpression(name, runTime, dict, typeName, "U")
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::functionObjects::Q::~Q()
{}
 
 
// ************************************************************************* //