Concentration distribution and slip velocity of coarse-particle-water mixture in horizontal and inclined pipe sections

0475219 - ÚH 2018 RIV CZ eng C - Conference Paper (international conference)
Vlasák, Pavel - Chára, Zdeněk - Konfršt, Jiří
Concentration distribution and slip velocity of coarse-particle-water mixture in horizontal and inclined pipe sections.
Engineering Mechanics 2017. Brno: University of technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, 2017 - (Fuis, V.), s. 1034-1037. ISBN 978-80-214-5497-2. ISSN 1805-8248.
[Engineering Mechanics 2017 /23./. Svratka (CZ), 15.05.2017-18.05.2017]
R&D Projects: GA ČR GA17-14271S
Institutional support: RVO:67985874
Keywords : hydraulic conveying * concentration distribution * pipe inclination * Gamma-Ray radiometry * mixture flow behaviour
OECD category: Fluids and plasma physics (including surface physics)

Narrow particle size distribution basalt pebbles of mean particle size 11.5 mm conveyed by water in the pipe sections of different inclination were investigated on an experimental pipe loop of inner diameter D = 100 mm. Mixture flow-behaviour and the concentration distribution were studied in a pipe viewing section and with the application of a gamma-ray densitometer. The study refers to the effect of mixture velocity, overall concentration, and angle of pipe inclination on chord-averaged concentration profiles and local concentration maps. The study revealed that the coarse particle-water mixtures in the inclined pipe sections were significantly stratified, the solid particles moved principally close to the pipe invert, and for higher and moderate flow velocities particle saltation becomes the dominant mode of particle conveying.
Permanent Link: http://hdl.handle.net/11104/0272063