tetBasedVoidFraction

Syntax

Defined in couplingProperties dictionary.

voidfractionModel tetBased;
tetBasedProps
{
    alphaMin         scalar;
    volScale         scalarList;
    volScaleGlobal   scalar;
}

  • alphaMin = minimum limit for voidfraction (default: 0.1)

  • volScale = scaling (per type) of the particle volume to account for porosity or agglomerations. (default: 1 for each particle type)

  • volScaleGlobal = volScale factor to apply for all particle types. This conveniently sets all elements of the volScale list to the same value. (default: 1)

Examples

voidfractionModel tetBased;
tetBasedProps
{
    alphaMin 0.1;
}

Description

The tetBased voidFraction model calculates the voidfraction in a CFD cell accounting for the volume of the particles whose centres are inside the cell. The volume is distributed between the cell center and vertices. Volume accounted to the vertices is split among cells sharing those. Consequently, this model leads to a smooth voidfraction distribution in space and time. It also leads to smooth transitions in voidfraction when particles cross cell boundaries. The same is valid for processor and cyclic boundaries.

The resulting voidfraction can be limited to a lower value by the alphaMin keyword which discards excess particle volume.

Restrictions

None.