Experimental and numerical study of free-falling streams of particles impacting an inclined surface

Abstract This paper presents a detailed experimental and numerical analysis of free-falling particle streams impacting 45° inclined surface differing materials. The particles used in this study were glass spheres with average diameters 136 342 µm density 2500 kg/m 3 . three mass flow rates considered are 50, 150, 250 grams per minute (gpm). effect wall material on the collision process was also analysed. Special attention paid to influence roughness. Therefore, plate stainless steel polished surface, an aluminium sheet, Perspex similar properties those rest sections used. data improve validate model frame Lagrangian approach. A new drag force formula that includes effects concentration as well Reynolds number implemented into commercially available codes from CFX4-4 package. It found improved CFD better predicted measurements for rebound properties. rough-wall these results showed greater smaller than larger particles. velocity changes slightly standard model, confirmed by both quantitative comparisons qualitative plots. Finally, inclusion particle-particle shown be dominant factor providing dispersion post collision. Without sufficient all behaving virtually identical, main stream continuing after process.