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engineCompRatio: Added support for specifying the combustion chamber cellSet/Zone

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Application
    engineCompRatio

Description
    Calculate the compression ratio of the engine combustion chamber

    If the combustion chamber is not the entire mesh a \c cellSet or
    \c cellZone name of the cells in the combustion chamber can be provided.

Usage
    \b engineCompRatio [OPTION]

      - \par -cellSet \<name\>
        Specify the cellSet name of the combustion chamber

      - \par -cellZone zoneName
        Specify the cellZone name of the combustion chamber
This commit is contained in:
Henry Weller
2023-07-24 10:08:07 +01:00
parent 55e5b17d92
commit c772291a9c
1 changed files with 66 additions and 22 deletions
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88
applications/utilities/postProcessing/miscellaneous/engineCompRatio/engineCompRatio.C
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@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2022 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2011-2023 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -25,15 +25,25 @@ Application
engineCompRatio
Description
Calculate the geometric compression ratio.
Calculate the compression ratio of the engine combustion chamber
Note that if you have valves and/or extra volumes it will not work,
since it calculates the volume at BDC and TDC.
If the combustion chamber is not the entire mesh a \c cellSet or
\c cellZone name of the cells in the combustion chamber can be provided.
Usage
\b engineCompRatio [OPTION]
- \par -cellSet \<name\>
Specify the cellSet name of the combustion chamber
- \par -cellZone zoneName
Specify the cellZone name of the combustion chamber
\*---------------------------------------------------------------------------*/
#include "argList.H"
#include "volMesh.H"
#include "cellSet.H"
using namespace Foam;
@ -41,49 +51,83 @@ using namespace Foam;
int main(int argc, char *argv[])
{
argList::addOption
(
"cellSet",
"name",
"Calculate the volume of the specified cellSet"
);
argList::addOption
(
"cellZone",
"name",
"Calculate the volume of the specified cellZone"
);
#include "setRootCase.H"
#include "createTime.H"
#include "createMesh.H"
// Cell labels of the cells in the combustion chamber
// Defaults to all cells
labelList ccCells(identityMap(mesh.nCells()));
word cellSetName;
word cellZoneName;
if (args.optionReadIfPresent("cellSet", cellSetName))
{
// Read the cellSet for the combustion chamber
const cellSet ccCellSet(mesh, cellSetName);
ccCells = ccCellSet.toc();
}
else if (args.optionReadIfPresent("cellZone", cellZoneName))
{
const cellZone& ccCellZone = mesh.cellZones()[cellZoneName];
ccCells = ccCellZone;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
scalar eps = 1.0e-10;
scalar fullCycle = 360.0;
scalar ca0 = -180.0;
scalar ca1 = 0.0;
const scalar eps = 1.0e-10;
// Search for the CA >= the current CA which is divisible by 180
int ca0 = -360;
while (runTime.userTimeValue() > ca0)
{
ca0 += fullCycle;
ca1 += fullCycle;
ca0 += 180;
}
int ca1 = ca0 + 180;
while (mag(runTime.userTimeValue() - ca0) > eps)
if (mag(runTime.userTimeValue() - ca0) > eps)
{
scalar t0 = runTime.userTimeToTime(ca0 - runTime.userTimeValue());
const scalar t0 = runTime.userTimeToTime(ca0 - runTime.userTimeValue());
runTime.setDeltaT(t0);
runTime++;
Info<< "CA = " << runTime.userTimeValue() << endl;
Info<< "Moving to CA = " << runTime.userTimeValue() << endl;
mesh.move();
}
scalar Vmax = sum(mesh.V().field());
const scalar V0 = gSum(scalarField(mesh.V(), ccCells));
Info << "Volume at " << runTime.userTimeValue() << "CA = " << V0 << endl;
while (mag(runTime.userTimeValue()-ca1) > eps)
if (mag(runTime.userTimeValue()-ca1) > eps)
{
scalar t1 = runTime.userTimeToTime(ca1 - runTime.userTimeValue());
const scalar t1 = runTime.userTimeToTime(ca1 - runTime.userTimeValue());
runTime.setDeltaT(t1);
runTime++;
Info<< "CA = " << runTime.userTimeValue() << endl;
Info<< "Moving to CA = " << runTime.userTimeValue() << endl;
mesh.move();
}
scalar Vmin = sum(mesh.V().field());
const scalar V1 = gSum(scalarField(mesh.V(), ccCells));
Info << "Volume at " << runTime.userTimeValue() << "CA = " << V1 << endl;
const scalar Vmin(min(V0, V1));
const scalar Vmax(max(V0, V1));
Info<< "\nCompression ratio = " << Vmax/Vmin << endl;
Info<< "\nVmax = " << Vmax;
Info<< ", Vmin = " << Vmin << endl;
Info<< "Compression ratio Vmax/Vmin = " << Vmax/Vmin << endl;
Info<< "\nEnd\n" << endl;
return 0;