/*---------------------------------------------------------------------------*\
  ==  == ====== ====   ====    |
                    \\     ||  | Multiphase Code Repository by HZDR
  ======   //   ||  || ===//   | Website: https://doi.org/10.14278/rodare.767
  ||  ||  //    ||  // || \\   | License: GPL-3.0-or-later
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License
    This file is part of the Multiphase Code Repository by HZDR.

    Copyright (C) 2025 by Helmholtz-Zentrum Dresden-Rossendorf e.V. (HZDR),
    Website: https://hzdr.de

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    computational fluid dynamics (CFD) from the OpenFOAM Foundation.
    Copyright (C) 2025 by OpenFOAM Foundation, Website: https://openfoam.org

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Class
    Foam::dragModels::timeScaleFiltered

Description
    A time scale filtering wrapper around an underlying drag model intended for
    simulations involving dispersed phase with a very small diameter.
    The model limits the drag coefficient based on the relaxation time given.

SourceFiles
    timeScaleFiltered.C

\*---------------------------------------------------------------------------*/

#ifndef timeScaleFilteredDrag_H
#define timeScaleFilteredDrag_H

#include "dispersedDragModel.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{
namespace dragModels
{

/*---------------------------------------------------------------------------*\
                    Class timeScaleFilteredDrag Declaration
\*---------------------------------------------------------------------------*/

class timeScaleFilteredDrag
:
    public dispersedDragModel
{
    // Private Data

        //- Pointer to the underlying drag model
        autoPtr<dragModel> dragModel_;

        //- The minimum relaxation time
        const dimensionedScalar minRelaxTime_;


public:

    //- Runtime type information
    TypeName("timeScaleFiltered");


    // Constructors

        //- Construct from a dictionary and an interface
        timeScaleFilteredDrag
        (
            const dictionary& dict,
            const phaseInterface& interface,
            const bool registerObject
        );


    //- Destructor
    virtual ~timeScaleFilteredDrag();


    // Member Functions

        //- Drag coefficient
        virtual tmp<volScalarField> CdRe() const;
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace dragModels
} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //
