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multiphaseEuler: New implicit drag algorithm replaces partial-elimination corrector

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The momentum equation central coefficient and drag matrix is formulated,
inverted and used to eliminate the drag terms from each of the phase momentum
equations which are combined for formulate a drag-implicit pressure equation.
This eliminates the lagged drag terms from the previous formulation which
significantly improves convergence for small particle and Euler-VoF high-drag
cases.

It would also be possible to refactor the virtual-mass terms and include the
central coefficients of the phase acceleration terms in the drag matrix before
inversion to further improve the implicitness of the phase momentum-pressure
coupling for bubbly flows.  This work is pending funding.
This commit is contained in:
Henry Weller
2023-08-26 10:09:38 +01:00
parent 49c69872e5
commit 5fd30443f3
44 changed files with 926 additions and 1212 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
tutorials/multiRegion/CHT/wallBoiling/system/fluid/fvSolution
View File

@ -68,7 +68,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/Grossetete/system/fvSolution
View File

@ -77,7 +77,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/LBend/system/fvSolution
View File

@ -92,7 +92,6 @@ PIMPLE
faceMomentum yes;
VmDdtCorrection no;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

5
tutorials/multiphaseEuler/bed/system/fvSolution
View File

@ -57,10 +57,11 @@ solvers
PIMPLE
{
nOuterCorrectors 3;
nCorrectors 1;
nOuterCorrectors 3;
nCorrectors 1;
nNonOrthogonalCorrectors 0;
dragCorrection yes;
}
relaxationFactors

1
tutorials/multiphaseEuler/bubbleColumn/system/fvSolution
View File

@ -73,7 +73,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/bubbleColumnEvaporating/system/fvSolution
View File

@ -73,7 +73,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/bubbleColumnEvaporatingDissolving/system/fvSolution
View File

@ -70,7 +70,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/bubbleColumnEvaporatingReacting/system/fvSolution
View File

@ -82,7 +82,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/bubbleColumnIATE/system/fvSolution
View File

@ -63,7 +63,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/bubbleColumnLES/system/fvSolution
View File

@ -73,7 +73,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/bubbleColumnLaminar/system/fvSolution
View File

@ -64,7 +64,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/bubblePipe/system/fvSolution
View File

@ -73,7 +73,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

3
tutorials/multiphaseEuler/damBreak4phase/system/fvSolution
View File

@ -79,8 +79,7 @@ PIMPLE
faceMomentum no;
VmDdtCorrection no;
dragCorrection no;
partialElimination no;
dragCorrection yes;
}
relaxationFactors

1
tutorials/multiphaseEuler/fluidisedBed/system/fvSolution
View File

@ -90,7 +90,6 @@ PIMPLE
faceMomentum no;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

3
tutorials/multiphaseEuler/fluidisedBedLaminar/system/fvSolution
View File

@ -89,8 +89,7 @@ PIMPLE
nNonOrthogonalCorrectors 0;
faceMomentum no;
dragCorrection yes;
partialElimination no;
dragCorrection no;
}
relaxationFactors

1
tutorials/multiphaseEuler/hydrofoil/system/fvSolution
View File

@ -83,7 +83,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection no;
dragCorrection yes;
partialElimination no;
}
cache

1
tutorials/multiphaseEuler/injection/system/fvSolution
View File

@ -64,7 +64,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

2
tutorials/multiphaseEuler/mixerVessel2D/0/alpha.map
View File

@ -14,7 +14,7 @@ FoamFile
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [];
dimensions [0 0 0 0 0 0 0];
internalField uniform 0.6;

1
tutorials/multiphaseEuler/mixerVessel2D/system/fvSolution
View File

@ -98,7 +98,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/mixerVessel2DMRF/system/fvSolution
View File

@ -85,7 +85,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/pipeBend/system/fvSolution
View File

@ -89,7 +89,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/steamInjection/system/fvSolution
View File

@ -86,7 +86,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination yes;
}
relaxationFactors

1
tutorials/multiphaseEuler/titaniaSynthesis/system/fvSolution
View File

@ -86,7 +86,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection no;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/titaniaSynthesisSurface/system/fvSolution
View File

@ -86,7 +86,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection no;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

5
tutorials/multiphaseEuler/wallBoilingIATE/system/fvSolution
View File

@ -68,6 +68,7 @@ solvers
PIMPLE
{
momentumPredictor no;
nOuterCorrectors 1;
nCorrectors 1;
nNonOrthogonalCorrectors 0;
@ -76,19 +77,19 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors
{
fields
{
thermalPhaseChange:dmdtf 1.0;
thermalPhaseChange:dmdtf 1;
}
equations
{
".*" 1;
"U\..*" 1;
"h\..*" 1;
}
}

1
tutorials/multiphaseEuler/wallBoilingPolydisperse/system/fvSolution
View File

@ -85,7 +85,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors

1
tutorials/multiphaseEuler/wallBoilingPolydisperseTwoGroups/system/fvSolution
View File

@ -85,7 +85,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors