MachNo.C

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    Copyright (C) 2019-2020 OpenCFD Ltd.
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#include "MachNo.H"
#include "fluidThermo.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionObjects
{
    defineTypeNameAndDebug(MachNo, 0);
    addToRunTimeSelectionTable(functionObject, MachNo, dictionary);
}
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
bool Foam::functionObjects::MachNo::calc()
{
    if
    (
        foundObject<volVectorField>(fieldName_)
     && foundObject<fluidThermo>(fluidThermo::dictName)
    )
    {
        const fluidThermo& thermo =
            lookupObject<fluidThermo>(fluidThermo::dictName);
 
        const volVectorField& U = lookupObject<volVectorField>(fieldName_);
 
        return store
        (
            resultName_,
            mag(U)/sqrt(thermo.gamma()*thermo.p()/thermo.rho())
        );
    }
 
    return false;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::functionObjects::MachNo::MachNo
(
    const word& name,
    const Time& runTime,
    const dictionary& dict
)
:
    fieldExpression(name, runTime, dict, "U")
{
    setResultName("Ma", "U");
}
 
 
// ************************************************************************* //