dimensionSets.H

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License
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Global
    dimensionSets
 
Description
    Useful dimension sets
 
SourceFiles
    dimensionSets.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef dimensionSets_H
#define dimensionSets_H
 
#include "scalarMatrices.H"
#include "dimensionedScalarFwd.H"
#include "PtrList.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
//- Dimensionless
extern const dimensionSet dimless;
 
extern const dimensionSet dimMass;
extern const dimensionSet dimLength;
extern const dimensionSet dimTime;
extern const dimensionSet dimTemperature;
extern const dimensionSet dimMoles;
extern const dimensionSet dimCurrent;
extern const dimensionSet dimLuminousIntensity;
 
extern const dimensionSet dimArea;
extern const dimensionSet dimVolume;
 
//- Older spelling for dimVolume
//  \deprecated(2019-01) use dimVolume instead
extern const dimensionSet dimVol;
 
extern const dimensionSet dimDensity;
extern const dimensionSet dimForce;
extern const dimensionSet dimEnergy;
extern const dimensionSet dimPower;
 
extern const dimensionSet dimVelocity;
extern const dimensionSet dimAcceleration;
extern const dimensionSet dimPressure;
extern const dimensionSet dimCompressibility;
extern const dimensionSet dimGasConstant;
extern const dimensionSet dimSpecificHeatCapacity;
extern const dimensionSet dimViscosity;
extern const dimensionSet dimDynamicViscosity;
 
 
//- Construction of unit sets
class dimensionSets
{
    // Private Data
 
        //- Set of dimensions
        PtrList<dimensionedScalar> units_;
 
        //- LU decomposition of dimensions
        scalarSquareMatrix conversion_;
 
        //- See above
        labelList conversionPivots_;
 
        //- Is LU decomposition valid
        bool valid_;
 
public:
 
    // Constructors
 
        //- Construct from all units and set of units to use
        //- for inversion (writing)
        dimensionSets
        (
            const HashTable<dimensionedScalar>&,
            const wordList& unitNames
        );
 
 
    // Member Functions
 
        //- Return the units
        const PtrList<dimensionedScalar>& units() const noexcept
        {
            return units_;
        }
 
        //- Is there a valid inverse of the selected unit
        bool valid() const noexcept
        {
            return valid_;
        }
 
        //- (if valid) obtain set of coefficients of unitNames
        void coefficients(scalarField& exponents) const;
};
 
 
//- Top level dictionary
dictionary& dimensionSystems();
 
//- Set of all dimensions
const HashTable<dimensionedScalar>& unitSet();
 
//- Set of units
const dimensionSets& writeUnitSet();
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //