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Effect of pipe inclination on flow behaviour of fine-grained settling slurry
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SYSNO ASEP 0496739 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Effect of pipe inclination on flow behaviour of fine-grained settling slurry Author(s) Vlasák, Pavel (UH-J) SAI, ORCID, RID
Chára, Zdeněk (UH-J) SAI, ORCID, RID
Matoušek, Václav (UH-J) ORCID, SAI, RID
Konfršt, Jiří (UH-J) SAI, ORCID, RID
Kesely, Mikoláš (UH-J) ORCIDArticle number 02094 Source Title EPJ Web of Conferences. - Paris : EDP Sciences, 2019 Number of pages 7 s. Publication form Online - E Action EFM18 - Experimental Fluid Mechanics 2018 Event date 13.11.2018 - 16.11.2018 VEvent location Prague Country CZ - Czech Republic Event type WRD Language eng - English Country FR - France Keywords fine-grained settling slurry ; inclinated pipe flow ; gamma-ray densitometry Subject RIV BK - Fluid Dynamics OECD category Fluids and plasma physics (including surface physics) R&D Projects GA17-14271S GA ČR - Czech Science Foundation (CSF) Institutional support UH-J - RVO:67985874 UT WOS 000504642200095 DOI 10.1051/epjconf/201921302094 Annotation The effect of flow parameters of fine-grained settling slurry on the pressure drop-velocity relationship, deposition limit velocity and local concentration distribution was studied in an experimental pipe loop of inner diameter D = 100 mm with inclinable pipe sections for pipe inclination ranging from – 45° to +45°. The slurry consisted from water and narrow particle size distribution glass beads of mean diameter d50 = 0.18 mm. The concentration distribution was studied with application of a gamma-ray densitometry. The deposition velocity was defined as the flow velocity at which stationary deposit started to be formed at the pipe invert. The study revealed the stratified flow pattern of the studied slurry in inclined pipe sections, for slurry velocities below to the deposition limit sliding or stationary bed were created in ascending pipe sections. For low pipe inclination (alpha < ± 25°) the effect of inclination on local concentration distribution was not significant. Mean transport concentration for descending flow was lower than that for the ascending flow Deposition limit in inclined pipe was slightly lower than that in horizontal pipe. Frictional pressure drops in ascending pipe were higher than that in descending pipe, the difference decreased with increasing velocity and inclination. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2020
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