DEMbasedDrag

Syntax

Defined in couplingProperties dictionary.

forceModels
(
    DEMbasedDrag
);
DEMbasedDragProps
{
    velFieldName         "U";
    voidfractionFieldName "voidfraction";
    interpolation        Switch;
    voidfractionInterpolationType word;
    UInterpolationType   word;

    // (optional) forceSubModel switches
    scaleDrag            scalar;
};

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

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

  • 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”)

  • usePointCloud = use point cloud defintion for particle. If true, implicit drag formulation is deactivated (default: false)

Examples

forceModels
(
    DEMbasedDrag
);
DEMbasedDragProps
{
    velFieldName         "U";
    voidfractionFieldName "voidfraction";
}

Description

The force model calculates the local fluid velocity and voidfraction, which is needed for the drag calculation by the DEM (see enable_dem_drag command) later on.

Restrictions

Note

This drag model requires that enable_dem_drag command be configured on the DEM side

Note

This drag model is only compatible with modelType B (see couplingProperties).

Note

If used with settings for particleShapeType (see couplingProperties) other than sphere, the user setting will be ignored and particleShapeType "sphere" will be used instead.