Number of the records: 1

Flow behaviour of sand-water mixture in horizontal and inclined pipes

SYSNO ASEP	0518120
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	The record was not marked in the RIV
Title	Flow behaviour of sand-water mixture in horizontal and inclined pipes
Author(s)	Vlasák, Pavel (UH-J)_{SAI, ORCID, RID} Chára, Zdeněk (UH-J)_{SAI, ORCID, RID} Matoušek, Václav (UH-J)_{ORCID, SAI, RID} Kesely, Mikoláš (UH-J)_ORCID Krupička, Jan (UH-J)_{SAI, RID} Konfršt, Jiří (UH-J)_{SAI, ORCID, RID} Mildner, Michael (UH-J)_{ORCID, SAI, RID}
Source Title	Proceedings of the International conference Experimental Fluid Mechanics 2019, 1. vydání. - Franzenbad : Experimental Fluid Mechanics, 2019 / Dančová P. ; Novosád J. ; Pulec J.
Pages	s. 580-586
Publication form	Print - P
Action	Experimental Fluid Mechanics 2019
Event date	19.11.2019 - 22.11.2019
VEvent location	Františkovy Lázně
Country	CZ - Czech Republic
Event type	WRD
Language	eng - English
Country	CZ - Czech Republic
Keywords	slurry flow ; inclined pipe ; deposit limit velocity
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
Annotation	Pipelines transporting slurries in different industrial applications often contain inclined sections. The effect of pipe inclination, slurry concentration and mean velocity on the flow behaviour, deposition limit velocity, and internal structure of a settling slurry was studied in an experimental pipe loop of inner diameter D = 100 mm. The slurry consisted from water and a narrow particle size distribution sand of mean diameter d50 = 0.55 mm. The experiments focused on the effects of the pipe inclination on solids distribution and deposition limit velocity. The concentration distribution in pipe cross-section was studied with application of a gamma-ray densitometer. The study revealed the stratified flow pattern of the medium sand-water mixture in inclined pipe sections. Experimental results show that the degree of the slurry stratification decreased with an increasing angle of inclination in the ascending pipe sections. The slurry stratification affected the deposition limit velocity. Mean in situ concentration for the descending flow was always lower than that for the ascending flow. The deposition limit in ascending pipe, in comparison with that in a horizontal pipe, slightly increased up to inclination angle about +25°, and then remained practically constant. For negative pipe inclination over – 30° no deposition limit was observed.
Workplace	Institute of Hydrodynamics
Contact	Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
Year of Publishing	2022

Number of the records: 1