Numerical analysis of dust emission by powder discharge and jet expansion

The paper deals with the Euler-Euler numerical simulation of an experimental study (Ansart et al., 2009[1]) of freely falling granular jetfor investigating the dispersion of dust. The configuration is a bunker,where quasi-static particulate flow takesplace, and a free-fall chamber. As a first step, a frictional viscosity model developed by Srivastava and Sundaresan (2003) [2] is implemented totake into account the frictional effects occurringin the quasi-static particulate flows. Without the frictional model for the viscosity, the numerical simulations overpredict the solid mass flow rate at the outlet of the bunker. When using the frictional viscosity, the solid mass flow rate is in better accordance with the experimental value. However, the solid velocity is overestimated in numerical simulations.