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foam-extend4.1-coherent-io/applications/solvers/overset/pimpleDyMOversetFoam/UEqn.H

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fvVectorMatrix UEqn
(
fvm::ddt(U)
+ fvm::div(phi, U)
+ turbulence->divDevReff()
);
UEqn.relax
(
mesh.solutionDict().equationRelaxationFactor
(
U.select(pimple.finalIter())
)
);
if (pimple.momentumPredictor())
{
solve(UEqn == -fvc::grad(p));
}