Soluciones del flujo bifásico granular

Abstract

Granular two-phase flows may be generated by the sudden displacement of a retention gate. Different criteria may be used to classify two-phase flows: hyperconcentrated flow, mud flow and debris flows. Limits that characterize different flow regimes are given. Numerical solutions using McCormack scheme for the continuity and conservation of momentum equations are presented. Characteristics of the deposition of granular solid material, obtained by a decrease of the channel slope or by sudden increase in its width, are determined. Numerical solutions are compared with a data obtained at the laboratory. It is found that numerical simulations offer a good approach to laboratory data, which represented two different flow conditions: saturated sand flow and flow of a plastic grains for different concentrations.