forceModel DiFeliceDrag command¶

Syntax¶

Defined in couplingProperties dictionary.

forceModels
(
    DiFeliceDrag
);
DiFeliceDragProps
{
    velFieldName          "U";
    voidfractionFieldName "voidfraction";
    granVelFieldName      "Us";
    scale                 scalar1;
    scaleDrag             scalar2;
    treatForceExplicit    switch1;
    implForceDEM          switch2;
    verbose               switch3;
    interpolation         switch4;
    scalarViscosity       switch5;
}

• U = name of the finite volume fluid velocity field

• voidfraction = name of the finite volume void fraction field

• Us = name of the finite volume granular velocity field

• scalar1 = (optional) scaling of particle diameter: d_sim=scale*d_real. d_sim=(potentially coarse-grained) particle diameter. scale=coarse-graining factor. d_real= particle diameter as it is measured.

• scalar2 = (optional) scaling factor which directly scales the drag force.

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

• switch2 = (optional, default false) sub model switch, see forceSubModel for details

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

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

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

Examples¶

forceModels
(
    DiFeliceDrag
);
DiFeliceDragProps
{
    velFieldName  "U";
    interpolation true;
}

Description¶

The force model performs the calculation of forces (e.g. fluid-particle interaction forces) acting on each DEM particle. The DiFeliceDrag model is a model that calculates the particle based drag force following the correlation of Di Felice (see Zhou et al. (2010), JFM).

Restrictions¶

none

Related commands¶

forceModel