Influence of Coarse-Dispersive Solid Phase on the ‘Particles-Wall’ Shear Stress in Turbulent Slurry Flow with High Solid Concentration

The paper concerns simulation of fully developed and axially-symmetrical turbulent flow of coarse-dispersive slurry if all solid particles have similar size and shape with particles diameter from 1 mm to 5 mm, solid density from 1045 kg/m 3 to 3000 kg/m 3 , and solid concentration by volume from 20% to 40%. The author examines the influence of particle diameter on additional shear stress due to the 'particles-wall' interactions for moderate and high solid concentration. The mathematical model was developed using Bagnold's concept, The mathematical model was successfully verified with own measurements of frictional head loss in vertical coarse -dispersive slurry flow, named: 'sand-water', 'polystyrene-water ' and 'pvc-water', [10], The mathematical model can predict 'particles-wall' shear stress, pressure drop and friction factor for coarse-dispersive turbulent slurry flow in a pipe,