%0 Journal Article
%T Influence of Coarse-Dispersive Solid Phase on the ¡®Particles-Wall¡¯ Shear Stress in Turbulent Slurry Flow with High Solid Concentration
%A Artur Bartosik
%J Archive of Mechanical Engineering
%D 2010
%I 
%R 10.2478/v10180-010-0003-1
%X 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/m3 to 3000 kg/m3, 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, [26] and assumes that the total wall shear stresses are equal to the sum of ¡®liquid-wall¡¯ and ¡®particles-wall¡¯ shear stresses. 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], [26]. The mathematical model can predict ¡®particles-wall¡¯ shear stress, pressure drop and friction factor for coarse-dispersive turbulent slurry flow in a pipe, [10]. The aim of the paper is to present qualitative and quantitative dependence of solid particle diameter, solid particle density, solid concentration, and Reynolds number for carrier liquid phase on the ¡®particles-wall¡¯ shear stress. It is demonstrated that the solid particle diameter plays crucial role in its dependence on the ¡®particles-wall¡¯ shear stress. It was proved that in particular flow conditions the ¡®particles-wall¡¯ shear stress is much higher compared to the carrier liquid wall shear stress.
%K turbulent slurry flow
%K particles-wall shear stres
%U http://versita.metapress.com/content/g3566450274j4008/?p=c94344ee5ce54a0689e7217c8cc85bb6&pi=2