Sat, 26 Jul 2008 07:29:34 BST CiteULike: kdesmond's library [206 articles] http://www.citeulike.org/user/kdesmond/article/2477160 CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/kdesmond/article/2477160 <i>Annual Review of Fluid Mechanics, Vol. 40, No. 1. (2008), pp. 1-24.</i><br /><br />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. Flows of Dense Granular Media Yoel Forterre Olivier Pouliquen doi:10.1146/annurev.fluid.40.111406.102142 Annual Review of Fluid Mechanics, Vol. 40, No. 1. (2008), pp. 1-24. 2008-03-06T05:28:36-00:00 2008 Annual Review of Fluid Mechanics 40 1 1 24 granular_flow qual qualifier