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180 lines
4.6 KiB
C++
180 lines
4.6 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2015-2016 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Class
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Foam::noiseModel
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Description
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Base class for noise models.
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Data is read from a dictionary, e.g.
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\verbatim
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rhoRef 0;
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N 4096;
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fl 25;
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fu 25;
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startTime 0;
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\endverbatim
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where
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\table
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Property | Description | Required | Default value
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rhoRef | Reference density | no | 1
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N | Number of samples in sampling window | no | 65536 (2^16)
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fl | Lower frequency bounds | no | 25
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fu | Upper frequency bounds | no | 10000
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startTime | Start time | no | 0
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graphFormat | Graph format | no | raw
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\endtable
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Note
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The number of samples in the sampling window must be a power of 2
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SourceFiles
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noiseModel.C
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\*---------------------------------------------------------------------------*/
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#ifndef noiseModel_H
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#define noiseModel_H
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#include "dictionary.H"
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#include "scalarList.H"
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#include "instantList.H"
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#include "windowModel.H"
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#include "runTimeSelectionTables.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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/*---------------------------------------------------------------------------*\
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Class noiseModel Declaration
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\*---------------------------------------------------------------------------*/
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class noiseModel
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{
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private:
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// Private Member Functions
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//- Disallow default bitwise copy construct
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noiseModel(const noiseModel&);
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//- Disallow default bitwise assignment
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void operator=(const noiseModel&);
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protected:
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// Protected Data
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//- Copy of dictionary used for construction
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const dictionary dict_;
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//- Reference density (to convert from kinematic to static pressure)
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scalar rhoRef_;
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//- Number of samples in sampling window, default = 2^16
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label nSamples_;
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//- Lower frequency limit, default = 25Hz
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scalar fLower_;
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//- Upper frequency limit, default = 10kHz
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scalar fUpper_;
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//- Start time, default = 0s
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scalar startTime_;
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//- Window model
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autoPtr<windowModel> windowModelPtr_;
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//- Graph format
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word graphFormat_;
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// Protected Member Functions
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//- Check and return uniform time step
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scalar checkUniformTimeStep
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(
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const scalarList& times
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) const;
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//- Find and return start time index
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label findStartTimeIndex
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(
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const instantList& allTimes,
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const scalar startTime
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) const;
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public:
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//- Runtime type information
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TypeName("noiseModel");
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//- Run time selection table
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declareRunTimeSelectionTable
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(
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autoPtr,
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noiseModel,
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dictionary,
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(
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const dictionary& dict
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),
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(dict)
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);
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//- Selector
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static autoPtr<noiseModel> New(const dictionary& dict);
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//- Constructor
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noiseModel(const dictionary& dict);
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//- Destructor
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virtual ~noiseModel();
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// Public Member Functions
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//- Abstract call to calculate
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virtual void calculate() = 0;
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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