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ENH: generalise masterCoarsest restart (GAMG)

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This commit is contained in:
mattijs 2023-02-21 17:30:23 +00:00 committed by Andrew Heather
parent 0680d0c553
commit 6a66a15b8f
15 changed files with 391 additions and 215 deletions
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65
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.C
View File

@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2016 OpenFOAM Foundation
Copyright (C) 2019-2021 OpenCFD Ltd.
Copyright (C) 2019-2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -48,11 +48,15 @@ namespace Foam
// * * * * * * * * * * * * Protected Member Functions * * * * * * * * * * * //
void Foam::GAMGAgglomeration::compactLevels(const label nCreatedLevels)
void Foam::GAMGAgglomeration::compactLevels
(
const label nCreatedLevels,
const bool doProcessorAgglomerate
)
{
nCells_.setSize(nCreatedLevels);
nCells_.setSize(nCreatedLevels, 0);
restrictAddressing_.setSize(nCreatedLevels);
nFaces_.setSize(nCreatedLevels);
nFaces_.setSize(nCreatedLevels, 0);
faceRestrictAddressing_.setSize(nCreatedLevels);
faceFlipMap_.setSize(nCreatedLevels);
nPatchFaces_.setSize(nCreatedLevels);
@ -60,8 +64,8 @@ void Foam::GAMGAgglomeration::compactLevels(const label nCreatedLevels)
meshLevels_.setSize(nCreatedLevels);
// Have procCommunicator_ always, even if not procAgglomerating
procCommunicator_.setSize(nCreatedLevels + 1);
if (processorAgglomerate())
procCommunicator_.setSize(nCreatedLevels + 1, -1);
if (doProcessorAgglomerate && processorAgglomerate())
{
procAgglomMap_.setSize(nCreatedLevels);
agglomProcIDs_.setSize(nCreatedLevels);
@ -71,13 +75,12 @@ void Foam::GAMGAgglomeration::compactLevels(const label nCreatedLevels)
procBoundaryFaceMap_.setSize(nCreatedLevels);
procAgglomeratorPtr_().agglomerate();
}
}
// Print a bit
if (debug)
{
void Foam::GAMGAgglomeration::printLevels() const
{
Info<< "GAMGAgglomeration:" << nl
<< " local agglomerator : " << type() << nl;
if (processorAgglomerate())
@ -129,7 +132,9 @@ void Foam::GAMGAgglomeration::compactLevels(const label nCreatedLevels)
//<< " "
<< nl;
for (label levelI = 0; levelI <= size(); levelI++)
const label maxSize = returnReduce(size(), maxOp<label>());
for (label levelI = 0; levelI <= maxSize; levelI++)
{
label nProcs = 0;
label nCells = 0;
@ -203,24 +208,27 @@ void Foam::GAMGAgglomeration::compactLevels(const label nCreatedLevels)
Info.stream().precision(oldPrecision);
}
Info<< endl;
}
}
bool Foam::GAMGAgglomeration::continueAgglomerating
(
const label nCellsInCoarsestLevel,
const label nFineCells,
const label nCoarseCells
const label nCoarseCells,
const label comm
) const
{
const label nTotalCoarseCells = returnReduce(nCoarseCells, sumOp<label>());
if (nTotalCoarseCells < Pstream::nProcs()*nCellsInCoarsestLevel_)
const label nTotalCoarseCells =
returnReduce(nCoarseCells, sumOp<label>(), UPstream::msgType(), comm);
if (nTotalCoarseCells < Pstream::nProcs(comm)*nCellsInCoarsestLevel)
{
return false;
}
else
{
const label nTotalFineCells = returnReduce(nFineCells, sumOp<label>());
const label nTotalFineCells =
returnReduce(nFineCells, sumOp<label>(), UPstream::msgType(), comm);
return nTotalCoarseCells < nTotalFineCells;
}
}
@ -333,7 +341,12 @@ const Foam::GAMGAgglomeration& Foam::GAMGAgglomeration::New
<< exit(FatalError);
}
return store(ctorPtr(mesh, controlDict).ptr());
auto agglomPtr(ctorPtr(mesh, controlDict));
if (debug)
{
agglomPtr().printLevels();
}
return store(agglomPtr.ptr());
}
}
@ -378,7 +391,12 @@ const Foam::GAMGAgglomeration& Foam::GAMGAgglomeration::New
}
else
{
return store(ctorPtr(matrix, controlDict).ptr());
auto agglomPtr(ctorPtr(matrix, controlDict));
if (debug)
{
agglomPtr().printLevels();
}
return store(agglomPtr.ptr());
}
}
}
@ -429,7 +447,7 @@ const Foam::GAMGAgglomeration& Foam::GAMGAgglomeration::New
<< exit(FatalError);
}
return store
auto agglomPtr
(
ctorPtr
(
@ -437,8 +455,13 @@ const Foam::GAMGAgglomeration& Foam::GAMGAgglomeration::New
cellVolumes,
faceAreas,
controlDict
).ptr()
)
);
if (debug)
{
agglomPtr().printLevels();
}
return store(agglomPtr.ptr());
}
}

33
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.H
View File

@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2016 OpenFOAM Foundation
Copyright (C) 2019-2022 OpenCFD Ltd.
Copyright (C) 2019-2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -53,6 +53,7 @@ SourceFiles
namespace Foam
{
// Forward Declarations
class lduMesh;
class lduMatrix;
class mapDistribute;
@ -151,18 +152,28 @@ protected:
//- Combine a level with the previous one
void combineLevels(const label curLevel);
//- Shrink the number of levels to that specified
void compactLevels(const label nCreatedLevels);
//- Shrink the number of levels to that specified. Optionally do
// processor agglomeration
void compactLevels
(
const label nCreatedLevels,
const bool doProcessorAgglomerate
);
//- Check the need for further agglomeration
bool continueAgglomerating
(
const label nCellsInCoarsestLevel,
const label nCells,
const label nCoarseCells
const label nCoarseCells,
const label comm
) const;
void clearLevel(const label leveli);
//- Print level overview
void printLevels() const;
// Processor agglomeration
@ -468,6 +479,20 @@ public:
const labelListListList& boundaryFaceMap(const label fineLeveli)
const;
// Helpers
//- Agglomerate from a starting level. Starting level is usually 0
//- (initial mesh) but sometimes >0 (restarting after processor
//- agglomeration)
virtual void agglomerate
(
const label nCellsInCoarsestLevel,
const label startLevel,
const scalarField& startFaceWeights,
const bool doProcessorAgglomerate = true
) = 0;
//- Given restriction determines if coarse cells are connected.
// Return ok is so, otherwise creates new restriction that is
static bool checkRestriction

14
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/algebraicPairGAMGAgglomeration/algebraicPairGAMGAgglomeration.C
View File

@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2016 OpenFOAM Foundation
Copyright (C) 2016 OpenCFD Ltd.
Copyright (C) 2016,2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -55,15 +55,19 @@ Foam::algebraicPairGAMGAgglomeration::algebraicPairGAMGAgglomeration
:
pairGAMGAgglomeration(matrix.mesh(), controlDict)
{
const lduMesh& mesh = matrix.mesh();
if (matrix.hasLower())
{
agglomerate(mesh, max(mag(matrix.upper()), mag(matrix.lower())));
agglomerate
(
nCellsInCoarsestLevel_,
0,
max(mag(matrix.upper()), mag(matrix.lower())),
true
);
}
else
{
agglomerate(mesh, mag(matrix.upper()));
agglomerate(nCellsInCoarsestLevel_, 0, mag(matrix.upper()), true);
}
}

2
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/dummyAgglomeration/dummyAgglomeration.C
View File

@ -74,7 +74,7 @@ Foam::dummyAgglomeration::dummyAgglomeration
}
// Shrink the storage of the levels to those created
compactLevels(nLevels_);
compactLevels(nLevels_, true);
}

20
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/dummyAgglomeration/dummyAgglomeration.H
View File

@ -34,8 +34,8 @@ SourceFiles
\*---------------------------------------------------------------------------*/
#ifndef dummyAgglomeration_H
#define dummyAgglomeration_H
#ifndef Foam_dummyAgglomeration_H
#define Foam_dummyAgglomeration_H
#include "GAMGAgglomeration.H"
@ -52,7 +52,7 @@ class dummyAgglomeration
:
public GAMGAgglomeration
{
// Private data
// Private Data
//- Preset number of levels
label nLevels_;
@ -81,6 +81,20 @@ public:
const lduMesh& mesh,
const dictionary& controlDict
);
//- Agglomerate from a starting level. Starting level is usually 0
//- (initial mesh) but sometimes >0 (restarting after processor
//- agglomeration)
virtual void agglomerate
(
const label nCellsInCoarsestLevel,
const label startLevel,
const scalarField& startFaceWeights,
const bool doProcessorAgglomerate = true
)
{
NotImplemented;
}
};

92
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/pairGAMGAgglomeration/pairGAMGAgglomerate.C
View File

@ -6,6 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2016 OpenFOAM Foundation
Copyright (C) 2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -32,43 +33,79 @@ License
void Foam::pairGAMGAgglomeration::agglomerate
(
const lduMesh& mesh,
const scalarField& faceWeights
const label nCellsInCoarsestLevel,
const label startLevel,
const scalarField& startFaceWeights,
const bool doProcessorAgglomerate
)
{
const label nFaces = mesh.lduAddr().lowerAddr().size();
if (faceWeights.size() != nFaces)
if (nCells_.size() < maxLevels_)
{
FatalErrorInFunction
<< "Supplied number of face weights " << faceWeights.size()
<< " does not correspond to the number of faces " << nFaces << endl
<< "This may be because of using a geometry-based"
<< " agglomeration method instead of a matrix-based one"
<< exit(FatalError);
// See compactLevels. Make space if not enough
nCells_.resize(maxLevels_);
restrictAddressing_.resize(maxLevels_);
nFaces_.resize(maxLevels_);
faceRestrictAddressing_.resize(maxLevels_);
faceFlipMap_.resize(maxLevels_);
nPatchFaces_.resize(maxLevels_);
patchFaceRestrictAddressing_.resize(maxLevels_);
meshLevels_.resize(maxLevels_);
// Have procCommunicator_ always, even if not procAgglomerating.
// Use value -1 to indicate nothing is proc-agglomerated
procCommunicator_.resize(maxLevels_ + 1, -1);
if (processorAgglomerate())
{
procAgglomMap_.resize(maxLevels_);
agglomProcIDs_.resize(maxLevels_);
procCommunicator_.resize(maxLevels_);
procCellOffsets_.resize(maxLevels_);
procFaceMap_.resize(maxLevels_);
procBoundaryMap_.resize(maxLevels_);
procBoundaryFaceMap_.resize(maxLevels_);
}
}
// Start geometric agglomeration from the given faceWeights
scalarField* faceWeightsPtr = const_cast<scalarField*>(&faceWeights);
scalarField faceWeights = startFaceWeights;
// Agglomerate until the required number of cells in the coarsest level
// is reached
label nPairLevels = 0;
label nCreatedLevels = 0;
label nCreatedLevels = startLevel;
while (nCreatedLevels < maxLevels_ - 1)
{
if (!hasMeshLevel(nCreatedLevels))
{
FatalErrorInFunction<< "No mesh at nCreatedLevels:"
<< nCreatedLevels
<< exit(FatalError);
}
const auto& fineMesh = meshLevel(nCreatedLevels);
label nCoarseCells = -1;
tmp<labelField> finalAgglomPtr = agglomerate
(
nCoarseCells,
meshLevel(nCreatedLevels).lduAddr(),
*faceWeightsPtr
fineMesh.lduAddr(),
faceWeights
);
if (continueAgglomerating(finalAgglomPtr().size(), nCoarseCells))
if
(
continueAgglomerating
(
nCellsInCoarsestLevel,
finalAgglomPtr().size(),
nCoarseCells,
fineMesh.comm()
)
)
{
nCells_[nCreatedLevels] = nCoarseCells;
restrictAddressing_.set(nCreatedLevels, finalAgglomPtr);
@ -78,32 +115,25 @@ void Foam::pairGAMGAgglomeration::agglomerate
break;
}
// Create coarse mesh
agglomerateLduAddressing(nCreatedLevels);
// Agglomerate the faceWeights field for the next level
{
scalarField* aggFaceWeightsPtr
(
new scalarField
scalarField aggFaceWeights
(
meshLevels_[nCreatedLevels].upperAddr().size(),
0.0
)
);
restrictFaceField
(
*aggFaceWeightsPtr,
*faceWeightsPtr,
aggFaceWeights,
faceWeights,
nCreatedLevels
);
if (nCreatedLevels)
{
delete faceWeightsPtr;
}
faceWeightsPtr = aggFaceWeightsPtr;
faceWeights = std::move(aggFaceWeights);
}
if (nPairLevels % mergeLevels_)
@ -119,13 +149,7 @@ void Foam::pairGAMGAgglomeration::agglomerate
}
// Shrink the storage of the levels to those created
compactLevels(nCreatedLevels);
// Delete temporary geometry storage
if (nCreatedLevels)
{
delete faceWeightsPtr;
}
compactLevels(nCreatedLevels, doProcessorAgglomerate);
}

19
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/pairGAMGAgglomeration/pairGAMGAgglomeration.H
View File

@ -6,6 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2013 OpenFOAM Foundation
Copyright (C) 2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -66,13 +67,6 @@ protected:
// Protected Member Functions
//- Agglomerate all levels starting from the given face weights
void agglomerate
(
const lduMesh& mesh,
const scalarField& faceWeights
);
//- No copy construct
pairGAMGAgglomeration(const pairGAMGAgglomeration&) = delete;
@ -102,6 +96,17 @@ public:
const lduAddressing& fineMatrixAddressing,
const scalarField& faceWeights
);
//- Agglomerate from a starting level. Starting level is usually 0
//- (initial mesh) but sometimes >0 (restarting after processor
//- agglomeration)
virtual void agglomerate
(
const label nCellsInCoarsestLevel,
const label startLevel,
const scalarField& startFaceWeights,
const bool doProcessorAgglomerate = true
);
};

3
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGProcAgglomerations/GAMGProcAgglomeration/GAMGProcAgglomeration.C
View File

@ -51,7 +51,8 @@ void Foam::GAMGProcAgglomeration::printStats
{
if (agglom.hasMeshLevel(levelI))
{
os << agglom.meshLevel(levelI).info() << endl;
os << "Level " << levelI << " mesh:"
<< agglom.meshLevel(levelI).info() << endl;
}
else
{

31
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGProcAgglomerations/masterCoarsestGAMGProcAgglomeration/masterCoarsestGAMGProcAgglomeration.C
View File

@ -62,6 +62,10 @@ Foam::masterCoarsestGAMGProcAgglomeration::masterCoarsestGAMGProcAgglomeration
0,
keyType::LITERAL
)
),
nMasterCoarsestCells_
(
controlDict.getOrDefault<label>("nCellsInMasterLevel", -1)
)
{
const auto* ePtr = controlDict.findEntry("nMasters", keyType::LITERAL);
@ -208,10 +212,37 @@ bool Foam::masterCoarsestGAMGProcAgglomeration::agglomerate()
agglomProcIDs,
comms_.back()
);
if (nMasterCoarsestCells_ > 0)
{
const label levelI = agglom_.size();
if (agglom_.hasMeshLevel(levelI))
{
const lduMesh& fineMesh = agglom_.meshLevel(levelI);
const auto& addr = fineMesh.lduAddr();
const scalarField weights
(
addr.lowerAddr().size(),
1.0
);
agglom_.agglomerate
(
nMasterCoarsestCells_,
levelI,
weights,
false
);
}
}
}
}
}
// Note that at this point for nMasterCoarsestCells_ the non-master
// processors will have less levels. This does/should not matter since
// they are not involved in those levels
}
// Print a bit
if (debug & 2)

24
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGProcAgglomerations/masterCoarsestGAMGProcAgglomeration/masterCoarsestGAMGProcAgglomeration.H
View File

@ -50,6 +50,11 @@ Description
// Alternative : specify number of (equi-distributed) masters
nMasters 2;
// Restart local agglomeration after processor agglomeration. Used
// as nCellsInCoarsestLevel. Only applicable for pair-wise local
// agglomeration methods.
nMasterCoarsestCells 1;
}
SourceFiles
@ -67,6 +72,9 @@ SourceFiles
namespace Foam
{
// Forward Declarations
class GAMGAgglomeration;
/*---------------------------------------------------------------------------*\
Class masterCoarsestGAMGProcAgglomeration Declaration
\*---------------------------------------------------------------------------*/
@ -79,6 +87,22 @@ class masterCoarsestGAMGProcAgglomeration
label nProcessorsPerMaster_;
const label nMasterCoarsestCells_;
DynamicList<label> comms_;
// Private Member Functions
//- No copy construct
masterCoarsestGAMGProcAgglomeration
(
const masterCoarsestGAMGProcAgglomeration&
) = delete;
//- No copy assignment
void operator=(const masterCoarsestGAMGProcAgglomeration&) = delete;
public:

3
src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGSolverAgglomerateMatrix.C
View File

@ -6,6 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2017 OpenFOAM Foundation
Copyright (C) 2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -298,7 +299,7 @@ void Foam::GAMGSolver::gatherMatrices
List<List<label>>& otherRanks
) const
{
if (debug)
if (debug & 2)
{
Pout<< "GAMGSolver::gatherMatrices :"
<< " collecting matrices from procs:" << procIDs

13
src/finiteVolume/fvMatrices/solvers/GAMGSymSolver/GAMGAgglomerations/faceAreaPairGAMGAgglomeration/faceAreaPairGAMGAgglomeration.C
View File

@ -6,6 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2016 OpenFOAM Foundation
Copyright (C) 2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -67,7 +68,8 @@ Foam::faceAreaPairGAMGAgglomeration::faceAreaPairGAMGAgglomeration
//agglomerate(mesh, sqrt(fvmesh.magSf().primitiveField()));
agglomerate
(
mesh,
nCellsInCoarsestLevel_,
0, //mesh,
mag
(
cmptMultiply
@ -77,7 +79,8 @@ Foam::faceAreaPairGAMGAgglomeration::faceAreaPairGAMGAgglomeration
vector(1, 1.01, 1.02)
//vector::one
)
)
),
true
);
}
@ -95,7 +98,8 @@ Foam::faceAreaPairGAMGAgglomeration::faceAreaPairGAMGAgglomeration
//agglomerate(mesh, sqrt(mag(faceAreas)));
agglomerate
(
mesh,
nCellsInCoarsestLevel_,
0, //mesh,
mag
(
cmptMultiply
@ -105,7 +109,8 @@ Foam::faceAreaPairGAMGAgglomeration::faceAreaPairGAMGAgglomeration
vector(1, 1.01, 1.02)
//vector::one
)
)
),
true
);
}

20
src/finiteVolume/lduPrimitiveMeshAssembly/assemblyFaceAreaPairGAMGAgglomeration/assemblyFaceAreaPairGAMGAgglomeration.C
View File

@ -5,7 +5,7 @@
\\ / A nd | www.openfoam.com
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2018-2019 OpenCFD Ltd.
Copyright (C) 2018-2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -181,7 +181,8 @@ assemblyFaceAreaPairGAMGAgglomeration
agglomerate
(
mesh,
nCellsInCoarsestLevel_,
0, //mesh,
mag
(
cmptMultiply
@ -189,7 +190,8 @@ assemblyFaceAreaPairGAMGAgglomeration
faceAreas/sqrt(mag(faceAreas)),
vector(1, 1.01, 1.02)
)
)
),
true
);
}
else
@ -199,7 +201,8 @@ assemblyFaceAreaPairGAMGAgglomeration
agglomerate
(
matrix.mesh(),
nCellsInCoarsestLevel_,
0, //matrix.mesh(),
mag
(
cmptMultiply
@ -209,7 +212,8 @@ assemblyFaceAreaPairGAMGAgglomeration
vector(1, 1.01, 1.02)
//vector::one
)
)
),
true
);
}
}
@ -228,7 +232,8 @@ assemblyFaceAreaPairGAMGAgglomeration
{
agglomerate
(
matrix.mesh(),
nCellsInCoarsestLevel_,
0, //matrix.mesh(),
mag
(
cmptMultiply
@ -236,7 +241,8 @@ assemblyFaceAreaPairGAMGAgglomeration
faceAreas/sqrt(mag(faceAreas)),
vector(1, 1.01, 1.02)
)
)
),
true
);
}

15
src/fvAgglomerationMethods/MGridGenGamgAgglomeration/MGridGenGAMGAgglomeration.C
View File

@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2017 OpenFOAM Foundation
Copyright (C) 2018 OpenCFD Ltd.
Copyright (C) 2018-2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -290,7 +290,16 @@ Foam::MGridGenGAMGAgglomeration::MGridGenGAMGAgglomeration
);
}
if (continueAgglomerating(finalAgglomPtr().size(), nCoarseCells))
if
(
continueAgglomerating
(
nCellsInCoarsestLevel_,
finalAgglomPtr().size(),
nCoarseCells,
meshLevel(nCreatedLevels).comm()
)
)
{
nCells_[nCreatedLevels] = nCoarseCells;
restrictAddressing_.set(nCreatedLevels, finalAgglomPtr);
@ -359,7 +368,7 @@ Foam::MGridGenGAMGAgglomeration::MGridGenGAMGAgglomeration
}
// Shrink the storage of the levels to those created
compactLevels(nCreatedLevels);
compactLevels(nCreatedLevels, true);
// Delete temporary geometry storage
if (nCreatedLevels)

4
tutorials/compressible/rhoSimpleFoam/squareBendLiq/Allrun
View File

@ -20,6 +20,10 @@ runParallel $(getApplication)
foamDictionary -entry solvers.p.processorAgglomerator -set 'masterCoarsest' system/fvSolution
runParallel -s masterCoarsest $(getApplication)
#- Run with processorAgglomerator+nCellsInMasterLevel
foamDictionary -entry solvers.p.nCellsInMasterLevel -set '1' system/fvSolution
runParallel -s nCellsInMasterLevel $(getApplication)
#- Run with processorAgglomerator - multiple masters
foamDictionary -entry solvers.p.nMasters -set '2' system/fvSolution
runParallel -s masterCoarsest2 $(getApplication)