Flow of heterogeneous slurry in horizontal and inclined pipes

0482420 - ÚH 2018 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Vlasák, Pavel - Chára, Zdeněk - Konfršt, Jiří - Kysela, Bohuš
Flow of heterogeneous slurry in horizontal and inclined pipes.
18th International Conference on Transport & Sedimentation of Solid Particles. Prague: Wroclaw University of Environmental and Life Sciences, 2017 - (Sobota, J.; Vlasák, P.; Matoušek, V.), s. 369-376. ISBN 978-83-7717-269-8.
[International Conference on Transport & Sedimentation of Solid Particles /18./. Praha (CZ), 11.09.2017-15.09.2017]
Grant CEP: GA ČR GA17-14271S
Institucionální podpora: RVO:67985874
Klíčová slova: solid-liquid mixture * pipe inclination * slip velocity * mixture flow behaviour * concentration distribution
Obor OECD: Fluids and plasma physics (including surface physics)

Narrow particle size distribution heterogeneous slurries were investigated on an experimental pipe loop with the horizontal and inclined pipe sections of inner diameter 100 mm. The investigation was focused on the effect of the pipe inclination, average slurry velocity and overall concentration and on the local concentration distribution, pressure drop, deposition limit and carrier liquid-particle slip velocity. The local concentration distribution was studied with the application of a gamma-ray densitometer. Mixture flow-behaviour and particles motion were investigated in a pipe viewing section. The study revealed that the heterogeneous slurries in the horizontal and inclined pipe sections were significantly stratified, the solid particles moved principally close to the pipe invert, and particle saltation becomes the dominant mode of particle conveying for higher and moderate flow velocities. Carrier liquid-particle slip velocity depends not only on the mixture velocity, but also on particle position in the pipe cross-section. The effect of pipe inclination on the frictional pressure drop in inclined pipe sections depends on mixture velocity, in ascending pipe section decreases with increasing mixture velocity and in descending pipe section the frictional pressure drop gradually decreased with increasing pipe inclination.
Trvalý link: http://hdl.handle.net/11104/0279138