Abstract
A computer code for simulating transient multidimensional free-surface rapid granular flows in regions with complex geometries is developed. The discrete-element computational scheme, which utilizes the integral form of the governing equations of motion, and a special discretization technique are used. The computational algorithm of the code also uses an explicit composite time-splitting integration method. The recently developed constitutive equations obtained from a kinetic model for rapid granular flows are used in the computer code. The computer code is capable of predicting the mean velocity, solid volume fraction and fluctuation energy profiles, as well as the surface elevation of rapid granular flows in complex geometries of industrial interest. The computational model is used and several transient nonuniform granular flows are analyzed. These include gravity flow down an inclined chute and three-dimensional flows around a block in a channel.
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