ENH: Updated noise utility to use new noise models
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@ -1,6 +1,7 @@
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EXE_INC = \
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-I$(LIB_SRC)/randomProcesses/lnInclude \
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-I$(LIB_SRC)/sampling/lnInclude
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-I$(LIB_SRC)/sampling/lnInclude \
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-I$(LIB_SRC)/surfMesh/lnInclude
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EXE_LIBS = \
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-lrandomProcesses \
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@ -3,7 +3,7 @@
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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) 2011-2015 OpenFOAM Foundation
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\\/ M anipulation |
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\\/ M anipulation | Copyright (C) 2016 OpenCFD Ltd.
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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@ -25,157 +25,161 @@ Application
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noise
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Description
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Utility to perform noise analysis of pressure data using the noiseFFT
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library.
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Utility to perform noise analysis of pressure data.
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Control settings are read from the $FOAM_CASE/system/noiseDict dictionary,
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or user-specified dictionary using the -dict option. Pressure data is
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read using a CSV reader:
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\heading Usage
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\verbatim
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pRef 101325;
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N 65536;
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nw 100;
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f1 25;
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fU 10000;
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graphFormat raw;
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Control settings are read from the $FOAM_CASE/system/noiseDict dictionary,
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or user-specified dictionary using the -dict option. Presure data can be
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supplied as a single time history at a given point location, or a surface
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of time histories, based on the run-time selectable \c noiseModel, e.g.
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pressureData
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\vebatim
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noiseModel <geometryType>Noise;
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<geometryType>Coeffs
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{
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fileName "pressureData"
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nHeaderLine 1; // number of header lines
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refColumn 0; // reference column index
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componentColumns (1); // component column indices
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separator " "; // optional (defaults to ",")
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mergeSeparators no; // merge multiple separators
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outOfBounds clamp; // optional out-of-bounds handling
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interpolationScheme linear; // optional interpolation scheme
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...
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}
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\endverbatim
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where \<geometryMode\> is either \c point or \surface
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Both operation types require:
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\verbatim
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pRef 101325;
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N 65536;
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fl 25;
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fu 10000;
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fftWriteInterval 1;
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dataMode point;
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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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pRef | Reference pressure | no | 0
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N | Number of samples in sampling window | no | 65536
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nw | Number of sampling windows | no | 100
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N | Number of samples in sampling window | no | 65536 (2^16)
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fl | Lower frequency band | no | 25
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fU | Upper frequency band | no | 10000
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graphFormat | Output graph format | no | raw
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fu | Upper frequency band | no | 10000
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fftWriteInterval | Output interval for FFT data | no | 1
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dataMode | Input data mode, 'point' or 'surface' | yes |
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\endtable
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Current graph outputs include:
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- FFT of the pressure data
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- narrow-band PFL (pressure-fluctuation level) spectrum
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- one-third-octave-band PFL spectrum
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- one-third-octave-band pressure spectrum
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Point-based pressure data is read using a CSV reader, and output in a
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graph format:
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\verbatim
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pointData
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{
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csvFileData
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{
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fileName "pressureData";
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nHeaderLine 1;
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refColumn 0;
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componentColumns (1);
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separator " ";
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mergeSeparators yes;
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}
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graphFormat raw;
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windowOverlapPercent 0;
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nWindow 100; // fixed number of windows
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}
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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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csvFileData | CSV file data dictionary - see CSV.H | yes |
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graphFormat | Output graph format | no | raw
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windowOverlapPercent | Window overla percent| yes |
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nWindow | Number of sampling windows | no | 1, calculated
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\endtable
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Surface-based pressure data is specified using a surface reader, and output
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using a surface writer. The reader type must support multiple time
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handling, e.g. the ensight format. Output surfaces are written on a
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per-frequency basis:
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\verbatim
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surfaceData
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{
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reader ensight;
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writer ensight;
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inputFile "postProcessing/faceSource1/surface/patch1/patch1.case";
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pName p;
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windowOverlapPercent 50;
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// nWindow 0; // let code decide if not present
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}
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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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reader | Surface reader type | yes |
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writer | Surface writer type | yes |
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inputFile | Pressure data surface file | yes |
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pName | Name of pressure field | no | p
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windowOverlapPercent | Window overla percent| yes |
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nWindow | Number of sampling windows | no | 1, calculated
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\endtable
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Current outputs include:
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- FFT of the pressure data (Pf)
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- narrow-band PFL (pressure-fluctuation level) spectrum (Lf)
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- one-third-octave-band PFL spectrum (Ldelta)
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- one-third-octave-band pressure spectrum (Pdelta)
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Note:
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- If using the windowOverlapPercent entry, the code will automatically
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determine number of windows
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- However, if supplied, the nWindow entry will take precedence
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SeeAlso
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CSV.H
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surfaceReader.H
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surfaceWriter.H
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noiseFFT.H
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noiseModel.H
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windowModel.H
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\*---------------------------------------------------------------------------*/
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#include "noiseFFT.H"
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#include "argList.H"
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#include "Time.H"
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#include "functionObjectFile.H"
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#include "CSV.H"
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#include "noiseModel.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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using namespace Foam;
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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Foam::scalar checkUniformTimeStep(const scalarField& t)
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{
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// check that a uniform time step has been applied
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scalar deltaT = -1.0;
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if (t.size() > 1)
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{
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for (label i = 1; i < t.size(); i++)
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{
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scalar dT = t[i] - t[i-1];
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if (deltaT < 0)
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{
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deltaT = dT;
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}
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if (mag(deltaT - dT) > SMALL)
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{
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FatalErrorInFunction
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<< "Unable to process data with a variable time step"
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<< exit(FatalError);
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}
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}
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}
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else
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{
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FatalErrorInFunction
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<< "Unable to create FFT with a single value"
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<< exit(FatalError);
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}
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return deltaT;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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argList::noParallel();
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#include "addDictOption.H"
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#include "setRootCase.H"
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#include "createTime.H"
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#include "createFields.H"
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Info<< "Reading data file" << endl;
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CSV<scalar> pData("pressure", dict, "Data");
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// time history data
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const scalarField t(pData.x());
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// pressure data
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const scalarField p(pData.y());
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if (t.size() < N)
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word dictName("noiseDict");
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if (args.optionFound("dict"))
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{
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FatalErrorInFunction
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<< "Block size N = " << N
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<< " is larger than number of data = " << t.size()
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<< exit(FatalError);
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dictName = args["dict"];
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}
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Info<< " read " << t.size() << " values" << nl << endl;
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IOdictionary dict
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(
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IOobject
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(
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dictName,
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runTime.system(),
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runTime,
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IOobject::MUST_READ
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)
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);
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Info<< "Creating noise FFT" << endl;
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noiseFFT nfft(checkUniformTimeStep(t), p);
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nfft -= pRef;
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fileName baseFileName(pData.fName().lessExt());
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graph Pf(nfft.RMSmeanPf(N, min(nfft.size()/N, nw)));
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Info<< " Creating graph for " << Pf.title() << endl;
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Pf.write(baseFileName + graph::wordify(Pf.title()), graphFormat);
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graph Lf(nfft.Lf(Pf));
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Info<< " Creating graph for " << Lf.title() << endl;
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Lf.write(baseFileName + graph::wordify(Lf.title()), graphFormat);
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graph Ldelta(nfft.Ldelta(Lf, f1, fU));
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Info<< " Creating graph for " << Ldelta.title() << endl;
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Ldelta.write(baseFileName + graph::wordify(Ldelta.title()), graphFormat);
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graph Pdelta(nfft.Pdelta(Pf, f1, fU));
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Info<< " Creating graph for " << Pdelta.title() << endl;
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Pdelta.write(baseFileName + graph::wordify(Pdelta.title()), graphFormat);
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autoPtr<noiseModel> model(noiseModel::New(dict));
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model->calculate();
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Info<< nl << "End\n" << endl;
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