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Aspherix Solver

Aspherix Calibration

averagingModel: dilute

Syntax

Defined in couplingProperties dictionary.

averagingModel dilute;

Examples

averagingModel dilute;

Description

The averaging model performs the Lagrangian->Eulerian mapping of data, especially it computes the average particle velocity on the Eulerian grid, usually referred to as $U_s$ .

The dilute model is supposed to be applied to cases where the granular regime is rather dilute, i.e. only few particles are present per CFD cell. The particle velocity inside a CFD cell is then evaluated from a single particle in a cell, i.e. no averaging takes place.

_images/averaging_dilute_dense.png — Figure 1: Comparison of results for dilute (mid) and dense (right) averaging models in an example situation with four particles (left). The dilute model picks an arbitrary particle and uses it’s velocity as value for $U_s$ in that CFD cell.

U_s — Figure 1: Comparison of results for dilute (mid) and dense (right) averaging models in an example situation with four particles (left). The dilute model picks an arbitrary particle and uses it’s velocity as value for $U_s$ in that CFD cell.

Restrictions

This model is computationally efficient, but should only be used when at most one particle is inside one CFD cell. Consider using dense if this requirement is not met.