<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Narrow particle size distribution basalt pebbles of mean particle size 11.5 mm conveyed by water in the pipe sections of different inclination were investigated on an experimental pipe loop, consisting of smooth stainless steel pipes of inner diameter <italic>D</italic> = 100 mm. Mixture flow-behaviour and particles motion along the pipe invert were studied in a pipe viewing section, the concentration distribution in pipe cross-section was studied with the application of a gamma-ray densitometer. The study refers to the effect of mixture velocity, overall concentration, and angle of pipe inclination on chord-averaged concentration profiles and local concentration maps, and flow behaviour of the coarse particle-water mixtures. The study revealed that the coarse particle-water mixtures in the inclined pipe sections were significantly stratified, the solid particles moved principally close to the pipe invert, and for higher and moderate flow velocities particle saltation becomes the dominant mode of particle conveying.</p></abstract>

Narrow particle size distribution basalt pebbles of mean particle size 11.5 mm conveyed by water in the pipe sections of different inclination were investigated on an experimental pipe loop, consisting of smooth stainless steel pipes of inner diameter D = 100 mm. Mixture flow-behaviour and particles motion along the pipe invert were studied in a pipe viewing section, the concentration distribution in pipe cross-section was studied with the application of a gamma-ray densitometer. The study refers to the effect of mixture velocity, overall concentration, and angle of pipe inclination on chord-averaged concentration profiles and local concentration maps, and flow behaviour of the coarse particle-water mixtures. The study revealed that the coarse particle-water mixtures in the inclined pipe sections were significantly stratified, the solid particles moved principally close to the pipe invert, and for higher and moderate flow velocities particle saltation becomes the dominant mode of particle conveying.

Flow behaviour and local concentration of coarse particles-water mixture in inclined pipes

Journal of Hydrology and Hydromechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Narrow particle size distribution basalt pebbles of mean particle size 11.5 mm conveyed by water in the pipe sections of different inclination were...

Flow behaviour and local concentration of coarse particles-water mixture in inclined pipes

Published Online: Mar 20, 2017

Page range: 183 - 191

Received: Aug 09, 2016

Accepted: Sep 26, 2016

DOI: https://doi.org/10.1515/johh-2017-0001

Keywords
Coarse particle mixture, Concentration distribution, Effect of pipe inclination, Gamma-ray radiometry, Hydraulic conveying, Mixture flow behaviour

© 2017 Pavel Vlasak et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Flow behaviour and local concentration of coarse particles-water mixture in inclined pipes

Published Online: Mar 20, 2017

Page range: 183 - 191

Received: Aug 09, 2016

Accepted: Sep 26, 2016

DOI: https://doi.org/10.1515/johh-2017-0001

KeywordsCoarse particle mixture, Concentration distribution, Effect of pipe inclination, Gamma-ray radiometry, Hydraulic conveying, Mixture flow behaviour

© 2017 Pavel Vlasak et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Coarse particle mixture, Concentration distribution, Effect of pipe inclination, Gamma-ray radiometry, Hydraulic conveying, Mixture flow behaviour