temperatureAndPressure.H

Go to the documentation of this file.

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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/>.
 
Global
    temperatureAndPressure.H
 
Description
    Accumulates values for temperature and pressure measurement, and
    calculates and outputs the average values at output times.
    Requires temperatureAndPressureVariables.H to be declared before the
    timeloop.
 
\*---------------------------------------------------------------------------*/
 
accumulatedTotalLinearMomentum += singleStepTotalLinearMomentum;
 
accumulatedTotalMass += singleStepTotalMass;
 
accumulatedTotalLinearKE += singleStepTotalLinearKE;
 
accumulatedTotalAngularKE += singleStepTotalAngularKE;
 
accumulatedTotalrDotfSum += singleStepTotalrDotf;
 
accumulatedNMols += singleStepNMols;
 
accumulatedDOFs += singleStepDOFs;
 
if (runTime.writeTime())
{
    if (accumulatedNMols)
    {
        Info<< "calculating averages" << endl;
 
        averageTemperature =
        (
            2.0/(physicoChemical::k.value()*accumulatedDOFs)
            *
            (
                accumulatedTotalLinearKE + accumulatedTotalAngularKE
                -
                0.5*magSqr(accumulatedTotalLinearMomentum)/accumulatedTotalMass
            )
        );
 
        averagePressure =
        (
            (
                (accumulatedNMols/nAveragingSteps)
               *physicoChemical::k.value()*averageTemperature
              + accumulatedTotalrDotfSum/(6.0*nAveragingSteps)
            )
            /
            meshVolume
        );
 
        Info<< "----------------------------------------" << nl
            << "Averaged properties" << nl
            << "Average |velocity| = "
            << mag(accumulatedTotalLinearMomentum)/accumulatedTotalMass << nl
            << "Average temperature = " << averageTemperature << nl
            << "Average pressure = " << averagePressure << nl
            << "----------------------------------------" << endl;
    }
    else
    {
        Info<< "Not averaging temperature and pressure: "
            << "no molecules in system" << endl;
    }
 
    accumulatedTotalLinearMomentum = Zero;
 
    accumulatedTotalMass = 0.0;
 
    accumulatedTotalLinearKE = 0.0;
 
    accumulatedTotalAngularKE = 0.0;
 
    accumulatedTotalrDotfSum = 0.0;
 
    accumulatedNMols = 0;
 
    accumulatedDOFs = 0;
}
 
 
// ************************************************************************* //