Conveying of coarse particles in inclined pipes

0447924 - ÚH 2016 RIV NL eng C - Conference Paper (international conference)
Vlasák, Pavel - Chára, Zdeněk - Konfršt, Jiří
Conveying of coarse particles in inclined pipes.
17th International Conference on Transport and Sedimentation of Solid Particles. Delft: Delft University of Technology, 2015, s. 355-362. ISBN 978-83-927084-8-3. ISSN 0867-7964.
[17th International Conference on Transport and Sedimentation of Solid Particles. Delft (NL), 22.09.2015-25.09.2015]
R&D Projects: GA ČR GAP105/10/1574
Institutional support: RVO:67985874
Keywords : coarse particle conveying * gamma-ray radiometry * concentration distribution * pipe inclination * mixture flow behaviour
Subject RIV: BK - Fluid Dynamics

Basalt pebbles of mean diameter 11.5 mm conveyed by water were investigated on an experimental pipe loop with horizontal, vertical, and inclined pipe sections, consisting of smooth stainless steel pipes of inner diameter D = 100 mm. The local particle concentration distribution in pipe cross-section was carried out with the application of a gamma-ray densitometer. The paper is focused on studying the effect of the mixture velocity and overall concentration on the coarse particle–water mixtures flow behaviour and concentration distribution in the pipe cross-section. Mixture flow-behaviour and particles motion along the pipe invert were studied in a pipe viewing section. Presented results refer to the effect of mixture velocity, overall concentration, and angle of pipe inclination on chord-averaged concentration and local concentration distribution in the inclined pipe sections. The study revealed that the coarse particle-water mixtures in the horizontal and inclined pipe sections were significantly stratified. The solid particles moved principally close to the pipe invert in the inclined pipe sections, and for higher and moderate flow velocities particle saltation becomes the dominant mode of particle conveying.
Permanent Link: http://hdl.handle.net/11104/0249677