Collisional Granular Flow as a Micropolar Fluid

2001/08/31 by Namiko Mitarai, Hisao Hayakawa, Hiizu Nakanishi · 3 citations
Engineering · Physics and Astronomy · #Granular flow and fluidized beds #Particle Dynamics in Fluid Flows #Soil and Unsaturated Flow #cond-mat.stat-mech

paper · pdf · doi:10.1103/physrevlett.88.174301

published as Phys. Rev. Lett. 88, 174301 (2002) · 4 pages, 1 figure, typos removed

openalex publication_date 2002/04/12 · arxiv created 2002/04/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We show that a micropolar fluid model successfully describes collisional granular flows on a slope. A micropolar fluid is the fluid with internal structures in which coupling between the spin of each particle and the macroscopic velocity field is taken into account. It is a hydrodynamical framework suitable for granular systems which consists of particles with macroscopic size. We demonstrate that the model equations can quantitatively reproduce the velocity and the angular velocity profiles obtained from the numerical simulation of the collisional granular flow on a slope using a simple estimate for the parameters in the theory.

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