Home

Aspherix Solver

Aspherix Calibration

totalMomentumExchange

Syntax

Defined in couplingProperties dictionary.

postProcessingModels
(
    totalMomentumExchange
);
totalMomentumExchangeProps
{
    implicitMomExFieldName "Ksl";
    explicitMomExFieldName "f";
    fluidVelFieldName "U";
    granVelFieldName "Us";
};

implicitMomExFieldName = name of the finite volume momentum exchange field of implicit forces (default: “Ksl”)
explicitMomExFieldName = name of the finite volume momentum exchange field of explicit forces. If no explicit couple model exitst choose “none”. (default: “f”)
fluidVelFieldName = name of the finite volume fluid velocity field (default: “U”)
granVelFieldName = name of the finite volume granular velocity field (default: “Us”)

Examples

postProcessingModels
(
    totalMomentumExchange
);
totalMomentumExchangeProps
{
    implicitMomExFieldName "Ksl";
    explicitMomExFieldName "none";
    fluidVelFieldName "U";
    granVelFieldName "Us";
}

Description

Every coupling step the total fluid-particle interaction force is evaluated by integration of $Ksl * (Us-U) / rho * Vcell + f$ over the whole CFD domain.

Note

The calculation is based on Ksl, U, Us and f of the previous time step. The solver typically reports the momentum exchange based on Ksl, Us and f of the current time step but U is the solution of the previous time step. This can lead to differences between solver output and this model’s output.

Restrictions

None.