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Aspherix Solver

Aspherix Calibration

BatchelorViscosity

Syntax

Defined in transportProperties dictionary.

viscosityModel BatchelorViscosity;

BatchelorViscosityCoeffs
{
    nu0      nu0 [ 0 2 -1 0 0 0 0 ] scalar;
}

scalar1 = reference viscosity

Examples

BatchelorViscosityCoeffs
{
    nu0      nu0 [ 0 2 -1 0 0 0 0 ] 1e-5;
}

Description

Calculates the viscosity according to the equation

$\frac{\nu}{\nu_0}= 1 + 2.5 \varepsilon + 7.8 \varepsilon^2,$

where $\nu_0$ is the reference viscosity and $\varepsilon$ is the particle volume fraction.

The model is valid for dilute suspensions with a maximal particle volume fraction between epsilon_p < 10% and < 15%.

Restrictions

Should only be applied to dilute systems with particle volume fractions of up to 15%.