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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
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tutorials/multiphaseEuler/injection/system/fvSolution
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@ -64,7 +64,6 @@ PIMPLE
faceMomentum no;
VmDdtCorrection yes;
dragCorrection yes;
partialElimination no;
}
relaxationFactors