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Experimental study of hydraulic transport of coarse basalt

SYSNO ASEP	0447391
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Experimental study of hydraulic transport of coarse basalt
Author(s)	Matoušek, Václav (UH-J)_{ORCID, SAI, RID} Vlasák, Pavel (UH-J)_{SAI, ORCID, RID} Chára, Zdeněk (UH-J)_{SAI, ORCID, RID} Konfršt, Jiří (UH-J)_{SAI, ORCID, RID}
Source Title	Institution of Civil Engineers. Proceedings. Maritime Engineering - ISSN 1741-7597 Roč. 148, č. 2 (2015), s. 93-100
Number of pages	8 s.
Publication form	Print - P
Language	eng - English
Country	GB - United Kingdom
Keywords	hydraulics ; hydrodynamics ; dredging ; pipes ; pipelines
Subject RIV	BK - Fluid Dynamics
R&D Projects	GAP105/10/1574 GA ČR - Czech Science Foundation (CSF)
Institutional support	UH-J - RVO:67985874
UT WOS	000360084600006
EID SCOPUS	84941141385
DOI	10.1680/jmaen.14.00023
Annotation	In many industrial applications, as in dredging or deep sea mining, coarse solid particles (typical size in the order of millimeters or tens of millimeters) are transported hydraulically in mixture with water through pipelines. This paper discusses experimental results obtained for flows of water-based slurries of three fractions of coarse basalt pebbles in a 100-mm pipe of the laboratory loop of the Institute of Hydrodynamics in Prague. The collected experimental database includes concentration distributions measured in the horizontal section of the pipe loop. The data are used to evaluate friction mechanisms of slurry flow and their relation to the internal structure of the flow. Measured frictional pressure drops are analysed and compared with existing predictive formulae. A theoretical background is proposed for a modified predictive formula for the frictional pressure drop in horizontal flow of slurry carrying coarse grains transported in saltation or as a sliding bed. The relative excess pressure drop in such flow is found to be sensitive primarily to the slip ratio, the thickness of a sliding bed and the solids friction coefficient. An accurate determination of frictional energy losses is essential to a successful assessment of an economy of hydraulic transport and to an optimisation of operations of slurry pipelines conveying very coarse solids.
Workplace	Institute of Hydrodynamics
Contact	Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
Year of Publishing	2016

Number of the records: 1