forceModel_viscForce command

Syntax

Defined in couplingProperties dictionary.

forceModels
(
    viscForce;
);
viscForceProps
{
    velocityFieldName "U";
    useAddedMass scalar1;
    suppressProbe switch1;
    treatForceExplicit switch2;
    treatForceDEM switch3;
    interpolation switch4;
    divTauInterpolationType "type1";
    scalarViscosity switch5;
    nu scalar2;
};

• U = name of the finite volume fluid velocity field
• scalar1 = (optional) coefficient of added mass accounted for
• switch1 = (optional, default false) can be used to suppress the output of the probe model
• switch2 = (optional, default true) sub model switch, see forceSubModel for details
• switch3 = (optional, default false) sub model switch, see forceSubModel for details
• switch4 = (optional, default false) sub model switch, see forceSubModel for details
• type1 = (optional, default cellPointFace) interpolation type for div(Tau) field
• switch5 = (optional, default false) sub model switch, see forceSubModel for details
• scalar2 = optional, only if switch5 is true

Examples

forceModels
(
    viscForce;
);
viscForceProps
{
    velocityFieldName "U";
}

Description

The force model performs the calculation of forces (e.g. fluid-particle interaction forces) acting on each DEM particle. The viscForce model calculates the particle based viscous force, -(grad(tau)) * Vparticle (see Zhou et al. (2010): “Discrete particle simulation of particle-fluid flow: model formulations and their applicability”, JFM).

Restrictions

none.

Related commands

forceModel