voidfractionModel_GaussVoidFraction command

Syntax:

Defined in couplingProperties dictionary.

voidfractionModel Gauss;
GaussProps
{
    maxCellsPerParticle number1;
    alphaMin number2;
    scaleUpVol number3;
} 

• number1 = max number of cells covered by a partilce (search will fail when more than number1 cells are covered by the particle)
• number2 = mininmum limit for voidfraction
• number3 = diameter of the particle's representation is artificially increased according to number3 * Vparticle, volume remains unaltered!

Examples:

voidfractionModel Gauss;
GaussProps
{
    maxCellsPerParticle 1000;
    alphaMin 0.10;
    scaleUpVol 5.0;
} 

Description:

The Gauss voidFraction model is supposed to be used when a particle (or it's representation) is bigger than a CFD cell. The voidfraction field is set in those cell whose centres are inside the particle. The volume is here distributed according to a Gaussian dirstibution.

The region of influence of a particle can be increased artificially by "scaleUpVol", which blows up the particles, but keeps their volume (for voidfraction calculation) constant.

Restrictions: none.

Related commands:

voidfractionModel , bigParticle