Engineering and Computer Science Faculty Publications

Title

On the Apparent Particle Dispersion in Granular Media

Document Type

Article

Publication Date

11-2011

Journal Title

Advanced Powder Technology

Volume

22

Issue

6

First Page

728

Last Page

734

Abstract

The apparent particle dispersion in a granular medium due to the combined effects of random granular arrangements and interstitial fluid flow was studied. The particle motion was a two-dimensional random walk on the transverse plane. The corresponding dispersion coefficient was found by sampling all possible trajectories with the aid of two granular media models. The theoretical results were verified by numerical simulation data obtained with commercial CFD software. Reasonably good agreement between the theory and simulation suggests that the present theory may be applied to practical granular system applications.

Keywords

Particle dispersion, Granular media, Apparent (effective) dispersion coefficent, Theory, Creeping flow