GidaspowDrag

Syntax

Defined in couplingProperties dictionary.

forceModels
(
    GidaspowDrag
);
GidaspowDragProps
{
    velFieldName         "U";
    voidfractionFieldName "voidfraction";
    granVelFieldName     "Us";
    phi                  scalar;
    voidfractionInterpolationType word;
    UInterpolationType   word;
    suppressProbe        switch;
    switchingVoidfraction scalar;

    // (optional) forceSubModel switches
    scaleDrag            scalar;
    scaleDH              scalar;
    treatForceExplicit   switch;
    implForceDEM         switch;
    verbose              switch;
    interpolation        switch;
    scalarViscosity      switch;
    nu                   scalar;
};

  • velFieldName = name of the finite volume fluid velocity field (default: “U”)

  • voidfractionFieldName = name of the finite volume voidfraction field (default: “voidfraction”)

  • granVelFieldName = name of the finite volume granular velocity field (default: “Us”)

  • phi = drag correction factor (default: 1)

  • interpolation = flag to use interpolated voidfraction and velocity values (default: false)

  • voidfractionInterpolationType = interpolation type for voidfraction field (default: “cellPoint”)

  • UInterpolationType = interpolation type for velocity field (default: “cellPointFace”)

  • suppressProbe = can be used to suppress the output of the probe model (default: false)

  • switchingVoidfraction = voidfraction above which dilute formulation will be used (default: 0.8)

This forceModel reads the following forceSubModel switches and overwrites the defaults as indicated in parentheses:

  • scaleDrag

  • scaleDH

  • treatForceExplicit

  • implForceDEM (default: true)

  • verbose

  • interpolation

  • scalarViscosity

Examples

forceModels
(
    GidaspowDrag
);
GidaspowDragProps
{
    velFieldName "U";
    voidfractionFieldName "voidfraction";
    granVelFieldName "Us";
}

Description

The force model performs the calculation of forces (e.g. fluid-particle interaction forces) acting on each DEM particle. The GidaspowDrag model is a model that calculates the particle based drag force following the correlation of Gidaspow which is a combination of Ergun (1952) and Wen & Yu (1966) (see Zhu et al. (2007): Discrete particle simulation of particulate systems: Theoretical developments, ChemEngScience).

Restrictions

None.