Local concentration distribution of settling slurry flow in inclined pipe sections

0517702 - ÚH 2020 RIV ZA eng C - Konferenční příspěvek (zahraniční konf.)
Vlasák, Pavel - Chára, Zdeněk - Matoušek, Václav - Kesely, Mikoláš - Krupička, Jan - Konfršt, Jiří
Local concentration distribution of settling slurry flow in inclined pipe sections.
19th International Conference on Transport & Sedimentation of Solid Particles. Cape Town: Wydawnictwo Uniwersytetu Przyrodniczego we Wrocławiu, 2019 - (Sobota, J.; Haldenwang, R.), s. 229-236. ISBN 978-83-7717-323-7. ISSN 0867-7964.
[International Conference on Transport and Sedimentation of Solid Particles /19./. Cape Town (ZA), 24.09.2019-27.09.2019]
Grant CEP: GA ČR GA17-14271S
Institucionální podpora: RVO:67985874
Klíčová slova: settling slurry * concentration distribution * pipe inclination * deposition limit
Obor OECD: Fluids and plasma physics (including surface physics)
http://ts.upwr.edu.pl/en/proceedings

Freight pipelines often contain inclined sections affecting the minimum velocity at which the pipelines should operate without a danger of pipe blockage. Narrow-graded sand-water slurry was investigated on an experimental pipe loop with inclinable pipe sections of inner diameter 100 mm in the Institute of Hydrodynamics in Prague. The investigation was focused on the effect of the pipe inclination, slurry concentration and velocity on the local concentration distribution and deposition limit. The settling slurries tend to stratify in horizontal and inclined pipe sections, typically exhibiting partial or fully stratified flow. Visualization and local concentration measurements revealed the stratified flow pattern of the settling slurry in inclined pipe sections. The solids distribution varied considerably with the pipe inclination, the degree of stratification was sensitive to pipe inclination and depended on slurry concentration and flow velocity. The observed concentration profiles showed different degrees of stratification for the positive and negative slope of the pipe. The ascending flow was less stratified than the corresponding descending flow.
Trvalý link: http://hdl.handle.net/11104/0303007