ABSTRACT
Furthermore, the ratio of these two stresses is also predicted to be a constant, independent of the imposed shear rate [ 14,24]. This theory has also been applied to the two-dimensional gravity flow of granular materials down an inclined plane. Savage has summarized the available data for concentration and velocity profiles [I] as well as the theoretical predictions [24]: agreement between theory and practice appears to be qualitative rather than quantitative. Recent progress has been made with the help of computer simulations [2,25]. which, for example, have been able to explain the decrease, with increasing solids concentration, of the ratio of the shear to normal stresses in shear flow that was seen in the data of Fig. 14.1 0. Computer simulations also allow us to explore the influence of variables such a nonspherical shape and a distribution of sizes.
