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Forum: OpenFOAM

December 21, 2012, 02:11

Replies: 6

rhoPimpleFoam/rhoPisoFoam-compressible flows

Views: 3,118

Posted By kalle

The solver is solving to find p at the new time...

The solver is solving to find p at the new time step. Rho at that time step is not known yet, as it depends on p. The solver can however still caluclate the ddt(rho) implicitly, as rho=p*psi, which...

Forum: OpenFOAM

December 20, 2012, 15:21

Replies: 6

rhoPimpleFoam/rhoPisoFoam-compressible flows

Views: 3,118

Posted By kalle

fvc::ddt(rho) would be an explicit formulation of...

fvc::ddt(rho) would be an explicit formulation of the density derivative. You want something implicit, as you want to find pressure at the new timestep, such that continuity equation is fulfilled....

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