1. Flows of Dense Granular Media
- Author
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Olivier Pouliquen, Yoël Forterre, Institut universitaire des systèmes thermiques industriels (IUSTI), and Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
granular flows ,[PHYS]Physics [physics] ,Physics ,Viscoplasticity ,friction ,Constitutive equation ,shallow water ,visco-plasticity ,Thermodynamics ,Mechanics ,Condensed Matter Physics ,Granular material ,01 natural sciences ,Instability ,010305 fluids & plasmas ,Condensed Matter::Soft Condensed Matter ,instability ,[SPI]Engineering Sciences [physics] ,Shear (geology) ,Rheology ,Free surface ,0103 physical sciences ,rheology ,010306 general physics ,Shallow water equations - Abstract
International audience; We review flows of dense cohesionless granular materials, with a special focus on the question of constitutive equations. We first discuss the existence of a dense flow regime characterized by enduring contacts. We then emphasize that dimensional analysis strongly constrains the relation between stresses and shear rates, and show that results from experiments and simulations in different configurations support a description in terms of a frictional visco-plastic constitutive law. We then discuss the successes and limitations of this empirical rheology in light of recent alternative theoretical approaches. Finally , we briefly present depth-averaged methods developed for free surface granular flows.
- Published
- 2008
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