forceModel_DiFeliceDrag command

Syntax

Defined in couplingProperties dictionary.

forceModels
(
    DiFeliceDrag
);
DiFeliceDragProps
{
    velFieldName "U";
    voidfractionFieldName "voidfraction";
    granVelFieldName "Us";
    interpolation switch1;
    voidfractionInterpolationType "type1";
    UInterpolationType "type2";
    suppressProbe       switch2;
    scale               scalar1;
    scaleDrag           scalar2;
    treatForceExplicit  switch3;
    implForceDEM        switch4;
    verbose             switch5;
    scalarViscosity     switch6;
    nu                  scalar3;
};
  • U = name of the finite volume fluid velocity field
  • voidfraction = name of the finite volume voidfraction field
  • Us = name of the finite volume granular velocity field
  • switch1 = (optional, normally off) flag to use interpolated voidfraction and velocity values
  • type1 = (optional, default cellPoint) interpolation type for voidfraction field
  • type2 = (optional, default cellPointFace) interpolation type for velocity field
  • switch2 = (optional, default false) can be used to suppress the output of the probe model
  • 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.
  • switch3 = sub model switch, see forceSubModel for details
  • switch4 = sub model switch, see forceSubModel for details
  • switch5 = sub model switch, see forceSubModel for details
  • switch6 = sub model switch, see forceSubModel for details
  • scalar3 = optional, only if switch6 is true

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.