forceModel interface command

Syntax

Defined in couplingProperties dictionary.

forceModels
(
    interface
);
interfaceProps
{
    VOFvoidfractionFieldName "alpha";
    gradAlphaName            "gradAlpha";
    alphaThreshold           scalar1;
    sigma                    scalar2;
    theta                    scalar3;
    deltaAlphaIn             scalar4;
    deltaAlphaOut            scalar5;
    C                        scalar6;
    treatForceExplicit       switch1;
}

  • alpha = name of the finite volume fluid volume fraction field in a VOF simulation

  • gradAlpha = name of gradient fluid volume fraction field

  • scalar1 = parameter used to define the distance of influence of the model

  • scalar2 = fluid gas surface tension

  • scalar3 = Three-phase contact angle for interface force

  • scalar4 = delta value subtracted from alphaThreshold

  • scalar5 = delta value added to alphaThreshold

  • scalar6 = (optional, default 1.0) factor to scale interfacial force

  • switch1 = (optional, default false) sub model switch, see forceSubModel for details

Examples

forceModels
(
    interface
);
interfaceProps
{
    VOFvoidfractionFieldName "alpha";
    gradAlphaName            "gradAlpha";
    alphaThreshold           0.55;
    sigma                    0.07;
    theta                    1.12;
    deltaAlphaIn             0.05;
    deltaAlphaOut            0.05;
}

Description

The force model performs the calculation of forces (e.g. fluid-particle interaction forces) acting on each DEM particle. The interface model is a model that calculates the particle-fluid-gas interfacial force. (see Wierink et al. (2011))

Restrictions

Only for VOF simulations.