surfaceNoise.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2015-2021 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::noiseModels::surfaceNoise
 
Description
    Perform noise analysis on surface-based pressure data.
 
    Input data is read from a dictionary, e.g.
 
    \verbatim
    // Pressure reference
    pRef            0;
 
    // Number of samples in sampling window, default = 2^16 (=65536)
    N               4096;
 
    // Lower frequency bounds
    fl              25;
 
    // Upper frequency bounds
    fu              25;
 
    // Start time
    startTime       0;
 
    windowModel     <modelType>
    <modelType>Coeffs
    {
        ...
    }
 
    // Input file
    file            "postProcessing/faceSource1/surface/patch/patch.case";
    //files           ("postProcessing/faceSource1/surface/patch/patch.case");
 
    // Write interval for FFT data, default = 1
    fftWriteInterval 100;
 
    // Area-weighted averaging switch, default = no (ensemble) for backwards
    // compatibility
    areaAverage     yes;
 
    // Surface reader
    reader          ensight;
 
    // Surface writer
    writer          ensight;
 
    // Collate times for ensight output - ensures geometry is only written once
    writeOptions
    {
        ensight
        {
            collateTimes true;
        }
 
        // Write Prmsf; default = yes
        writePrmsf  no;
 
        // Write SPL; default = yes
        writeSPL    yes;
 
        // Write PSD; default = yes
        writePSD    yes;
 
        // Write PSDf; default = yes
        writePSDf   no;
 
        // Write writeOctaves; default = yes
        writeOctaves yes;
    }
 
    \endverbatim
 
SourceFiles
    surfaceNoise.C
 
SeeAlso
    noiseModel.H
 
 
\*---------------------------------------------------------------------------*/
 
#ifndef noiseModels_surfaceNoise_H
#define noiseModels_surfaceNoise_H
 
#include "noiseModel.H"
#include "labelList.H"
#include "scalarField.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declarations
class surfaceReader;
class surfaceWriter;
 
namespace noiseModels
{
 
/*---------------------------------------------------------------------------*\
                        Class surfaceNoise Declaration
\*---------------------------------------------------------------------------*/
 
class surfaceNoise
:
    public noiseModel
{
 
protected:
 
    // Protected Data
 
        //- Input file names
        List<fileName> inputFileNames_;
 
        //- Name of pressure field
        word pName_;
 
        //- Index of pressure field in reader field list
        label pIndex_;
 
        //- Sample times
        scalarList times_;
 
        //- Time step (constant)
        scalar deltaT_;
 
        //- Start time index
        label startTimeIndex_;
 
        //- Number of surface faces
        label nFace_;
 
        //- Frequency data output interval, default = 1
        //  nSamples/2 data points are returned from the FFT, which can
        //  result in a very large number of output files (1 per frequency)
        label fftWriteInterval_;
 
        //- Apply area average; default = no (ensemble average) for backwards
        //- compatibility
        bool areaAverage_;
 
        //- Reader type
        word readerType_;
 
        //- Pointer to the surface reader
        mutable autoPtr<surfaceReader> readerPtr_;
 
        //- Pointer to the surface writer
        mutable autoPtr<surfaceWriter> writerPtr_;
 
 
    // Protected Member Functions
 
        //- Initialise
        void initialise(const fileName& fName);
 
        //- Read surface data
        void readSurfaceData
        (
            const labelList& procFaceOffset,
            List<scalarField>& pData
        );
 
        //- Write surface data to file
        //  Returns the area average value
        scalar writeSurfaceData
        (
            const fileName& outDirBase,
            const word& fName,
            const word& title,
            const scalar freq,
            const scalarField& data,
            const labelList& procFaceOffset,
            const bool writeSurface
        ) const;
 
        //- Calculate the area average value
        scalar surfaceAverage
        (
            const scalarField& data,
            const labelList& procFaceOffset
        ) const;
 
 
public:
 
    //- Runtime type information
    TypeName("surfaceNoise");
 
    //- Constructor
    surfaceNoise(const dictionary& dict, const bool readFields = true);
 
    //- Destructor
    virtual ~surfaceNoise() = default;
 
 
    // Public Member Functions
 
        //- Read from dictionary
        virtual bool read(const dictionary& dict);
 
        //- Calculate
        virtual void calculate();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace noiseModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //