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fvModels: Added maxDeltaT() function to provide a time-step limiter

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fvModels.maxDeltaT() calls are now included in the setDeltaT.H files to
additionally limit the time-step if any fvModel require it.
This commit is contained in:
Henry Weller
2022-02-08 16:27:06 +00:00
parent e22870f508
commit e478bb9b09
9 changed files with 150 additions and 38 deletions
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19
applications/solvers/combustion/XiFoam/PDRFoam/setDeltaT.H
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2021 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2011-2022 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -33,17 +33,14 @@ Description
if (adjustTimeStep)
{
scalar maxDeltaTFact = maxCo/(CoNum + StCoNum + small);
scalar deltaTFact = min(min(maxDeltaTFact, 1.0 + 0.1*maxDeltaTFact), 1.2);
scalar maxDeltaT = maxCo*runTime.deltaTValue()/(CoNum + StCoNum + small);
runTime.setDeltaT
(
min
(
deltaTFact*runTime.deltaTValue(),
maxDeltaT
)
);
maxDeltaT = min(maxDeltaT, fvModels.maxDeltaT());
const scalar deltaT =
min(min(maxDeltaT, 1.0 + 0.1*maxDeltaT), 1.2*runTime.deltaTValue());
runTime.setDeltaT(min(deltaT, maxDeltaT));
Info<< "deltaT = " << runTime.deltaTValue() << endl;
}

46
applications/solvers/compressible/rhoCentralFoam/setDeltaT.H Normal file
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@ -0,0 +1,46 @@
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2022 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
setDeltaT
Description
Reset the timestep to maintain a constant maximum courant Number.
Reduction of time-step is immediate, but increase is damped to avoid
unstable oscillations.
\*---------------------------------------------------------------------------*/
if (adjustTimeStep)
{
scalar maxDeltaT = maxCo*runTime.deltaTValue()/(CoNum + small);
const scalar deltaT =
min(min(maxDeltaT, 1.0 + 0.1*maxDeltaT), 1.2*runTime.deltaTValue());
runTime.setDeltaT(min(deltaT, maxDeltaT));
Info<< "deltaT = " << runTime.deltaTValue() << endl;
}
// ************************************************************************* //

48
applications/solvers/multiphase/twoLiquidMixingFoam/setDeltaT.H Normal file
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@ -0,0 +1,48 @@
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2022 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
setDeltaT
Description
Reset the timestep to maintain a constant maximum courant Number.
Reduction of time-step is immediate, but increase is damped to avoid
unstable oscillations.
\*---------------------------------------------------------------------------*/
if (adjustTimeStep)
{
scalar maxDeltaT =
min(maxCo/(CoNum + small), maxAlphaCo/(alphaCoNum + small))
*runTime.deltaTValue();
const scalar deltaT =
min(min(maxDeltaT, 1.0 + 0.1*maxDeltaT), 1.2*runTime.deltaTValue());
runTime.setDeltaT(min(deltaT, maxDeltaT));
Info<< "deltaT = " << runTime.deltaTValue() << endl;
}
// ************************************************************************* //

8
src/finiteVolume/cfdTools/general/fvModels/fvModel.C
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2021 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2021-2022 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -146,6 +146,12 @@ bool Foam::fvModel::addsSupToField(const word& fieldName) const
}
Foam::scalar Foam::fvModel::maxDeltaT() const
{
return great;
}
FOR_ALL_FIELD_TYPES(IMPLEMENT_FV_MODEL_ADD_SUP, fvModel);

5
src/finiteVolume/cfdTools/general/fvModels/fvModel.H
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2021 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2021-2022 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -258,6 +258,9 @@ public:
// field's transport equation
virtual bool addsSupToField(const word& fieldName) const;
//- Return the maximum time-step for stable operation
virtual scalar maxDeltaT() const;
// Sources

17
src/finiteVolume/cfdTools/general/fvModels/fvModels.C
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2021 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2021-2022 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -237,6 +237,21 @@ bool Foam::fvModels::addsSupToField(const word& fieldName) const
}
Foam::scalar Foam::fvModels::maxDeltaT() const
{
const PtrListDictionary<fvModel>& modelList(*this);
scalar maxDeltaT = great;
forAll(modelList, i)
{
maxDeltaT = min(maxDeltaT, modelList[i].maxDeltaT());
}
return maxDeltaT;
}
void Foam::fvModels::preUpdateMesh()
{
PtrListDictionary<fvModel>& modelList(*this);

5
src/finiteVolume/cfdTools/general/fvModels/fvModels.H
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2021 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2021-2022 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -130,6 +130,9 @@ public:
// field's transport equation
virtual bool addsSupToField(const word& fieldName) const;
//- Return the maximum time-step for stable operation
virtual scalar maxDeltaT() const;
// Sources

19
src/finiteVolume/cfdTools/general/include/setDeltaT.H
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2018 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2011-2022 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -33,17 +33,14 @@ Description
if (adjustTimeStep)
{
scalar maxDeltaTFact = maxCo/(CoNum + small);
scalar deltaTFact = min(min(maxDeltaTFact, 1.0 + 0.1*maxDeltaTFact), 1.2);
scalar maxDeltaT = maxCo*runTime.deltaTValue()/(CoNum + small);
runTime.setDeltaT
(
min
(
deltaTFact*runTime.deltaTValue(),
maxDeltaT
)
);
maxDeltaT = min(maxDeltaT, fvModels.maxDeltaT());
const scalar deltaT =
min(min(maxDeltaT, 1.0 + 0.1*maxDeltaT), 1.2*runTime.deltaTValue());
runTime.setDeltaT(min(deltaT, maxDeltaT));
Info<< "deltaT = " << runTime.deltaTValue() << endl;
}

21
src/twoPhaseModels/twoPhaseMixture/VoF/setDeltaT.H
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2020 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2011-2022 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -33,19 +33,16 @@ Description
if (adjustTimeStep)
{
scalar maxDeltaTFact =
min(maxCo/(CoNum + small), maxAlphaCo/(alphaCoNum + small));
scalar maxDeltaT =
min(maxCo/(CoNum + small), maxAlphaCo/(alphaCoNum + small))
*runTime.deltaTValue();
scalar deltaTFact = min(min(maxDeltaTFact, 1.0 + 0.1*maxDeltaTFact), 1.2);
maxDeltaT = min(maxDeltaT, fvModels.maxDeltaT());
runTime.setDeltaT
(
min
(
deltaTFact*runTime.deltaTValue(),
maxDeltaT
)
);
const scalar deltaT =
min(min(maxDeltaT, 1.0 + 0.1*maxDeltaT), 1.2*runTime.deltaTValue());
runTime.setDeltaT(min(deltaT, maxDeltaT));
Info<< "deltaT = " << runTime.deltaTValue() << endl;
}