muScaling

Syntax

Configured in constant/heRhoThermoCFDEMDict dictionary.

muScaling
{
    muScalingField    <nameOfScalingField>;
    muScalingFunction <Function1>;
}

  • muScalingField is the name of the field to used to scale the viscosty

  • muScalingFunction is the OpenFOAM Function1 type encoding the viscosity scaling as a function of muScalingField (applied on a per cell basis)

Examples

Example uses the void fraction to scale the viscosity according the Krieger-Dougherty viscosity model using a table type Function1 to encode the scaling:

muScaling
{
    muScalingField  voidfraction;
    muScalingFunction
    {
        type        table;
        values
        (
            (0.354500 3232.3164292368783)
            (0.355000 2723.691700747595)
            (0.375000 199.21942875099307)
            (0.400000 64.58890881481676)
            (0.425000 33.42024670841939)
            (0.450000 20.94036293570043)
            (0.500000 10.835174464418385)
            (0.600000 4.724237149970423)
            (0.700000 2.7344729555333895)
            (0.800000 1.8176651042516498)
            (0.900000 1.3118821838273398)
            (1.000000 1.0)
        );
        outOfBounds   clamp; // optional, will clamp values outside the range to the nearest value
        interpolation linear; // optional, sets linear interpolation between values
    }
}

For a full list of Function1 types please consult your OpenFOAM distribution.

Description

Calculates the viscosity used in solving the flow equations and for particle drag calculation.

Restrictions

Available for solvers that use a thermoType to configure the fluid properties, i.e. compressible flow solvers, and that use the heRhoThermoCFDEM type in the thermoType.