Volume 87, Number 1, July 2009
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||15 July 2009|
Bistability and hysteresis in dense shear granular flow
Department of Physics, Oakland University - Rochester, MI 48309, USA
Corresponding author: email@example.com
Accepted: 14 June 2009
We consider dense Couette flow of inelastically colliding hard disks. Depending on the inelasticity of particle collisions and average density of particles, various flow regimes are found, and possible selection mechanisms are discussed. These regimes are investigated using both hydrodynamic equations and event-driven molecular dynamics (MD) simulations. One of the most intriguing flow regimes is the “plug flow”, where a solid-like cluster coexists with a fluid layer. The entire phase diagram of parameters is explored, and bifurcation diagrams are presented. We theoretically predict bistability and hysteretic behavior and confirm this prediction in MD simulations.
PACS: 45.70.Mg – Granular flow: mixing, segregation and stratification / 45.70.Qj – Pattern formation / 83.50.Ax – Steady shear flows, viscometric flow
© EPLA, 2009
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