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Effect of pipe inclination on coarse-grained particle-water mixtures flow
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SYSNO ASEP 0535520 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Effect of pipe inclination on coarse-grained particle-water mixtures flow Author(s) Vlasák, Pavel (UH-J) SAI, ORCID, RID
Chára, Zdeněk (UH-J) SAI, ORCID, RID
Konfršt, Jiří (UH-J) SAI, ORCID, RID
Krupička, Jan (UH-J) SAI, RIDArticle number 3 Source Title Electronic journal of Polish agricultural universities. - : Wydawnictwo Uniwersytetu Przyrodniczego we Wroclawiu - ISSN 1505-0297
Roč. 23, č. 2 (2020)Number of pages 17 s. Publication form Online - E Language eng - English Country PL - Poland Keywords solid-liquid mixture ; pipe inclination ; pressure drops ; concentration distribution 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) GAP105/10/1574 GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UH-J - RVO:67985874 DOI 10.30825/5.EJPAU.187.2020.23.2 Annotation The effect of the mixture velocity, solid concentration, and pipe inclination on the coarse-grained particle–water mixtures flow behaviour, concentration distribution, and pressure drops were experimentally studied in horizontal, vertical, and inclined pipes of inner diameter D=100 mm. Graded basalt gravel was used as a solid phase. The local concentration distribution was studied with the application of a gamma-ray densitometer. The study revealed the stratified flow pattern of the coarse particle-water mixture in horizontal and inclined pipes. The particles moved principally close to the pipe invert, and particle saltation becomes the dominant mode of particle conveying for higher and moderate flow velocities. The frictional pressure droops in ascending pipe increases with increasing pipe inclination up to about 30 degrees, then gradually decreases. For the pipe inclination lower than about 30°, the effect of pipe inclination on local concentration distribution was not significant. The in-situ concentration reached higher values in the ascending than in the descending sections. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2021 Electronic address http://www.ejpau.media.pl/volume23/issue2/art-03.html
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