forceModel KochHillDrag command¶

Syntax¶

Defined in couplingProperties dictionary.

forceModels
(
    KochHillDrag
);
KochHillDragProps
{
    velFieldName            "U";
    voidfractionFieldName   "voidfraction";
    granVelFieldName        "Us"
    treatForceExplicit      switch1;
    implForceDEM            switch2;
    verbose                 switch3;
    interpolation           switch4;
    implForceDEMaccumulated switch5;
    scalarViscosity         switch6;
}

• U = name of the finite volume fluid velocity field

• voidfraction = name of the finite volume void fraction field

• Us = (optional, default “Us”) name of finite volume granular velocity field

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

• switch2 = (optional, default false) flag to use implicit formulation of drag on DEM side

• switch3 = (optional, default false) sub model switch, see forceSubModel for details

• switch4 = (optional, default false) flag to use interpolated void fraction and fluid velocity values

• switch5 = (optional, default false) sub model switch, see forceSubModel for details

• switch6 = (optional, default false) sub model switch, see forceSubModel for details

Examples¶

forceModels
(
    KochHillDrag
);
KochHillDragProps
{
    velFieldName "U";
    voidfractionFieldName "voidfraction";
}

Description¶

The force model performs the calculation of forces (e.g. fluid-particle interaction forces) acting on each DEM particle. The KochHillDrag model is a model that calculates the particle based drag force following the correlation of Koch & Hill (2001) (see van Buijtenen et al. (2011): “Numerical and experimental study on multiple-spout fluidized beds”, ChemEngScience).

Restrictions¶

none

Related commands¶

forceModel