Flow behaviour and structure of heterogeneous particles-water mixture in horizontal and inclined pipes

0482066 - ÚH 2019 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Vlasák, Pavel - Chára, Zdeněk - Konfršt, Jiří
Flow behaviour and structure of heterogeneous particles-water mixture in horizontal and inclined pipes.
EPJ Web of Conferences. Vol. 180. Les Ulis: EDP Sciences, 2018 - (Dančová, P.), č. článku 02120. E-ISSN 2100-014X.
[Experimental Fluid Mechanics 2017. Mikulov (CZ), 21.11.2017-24.11.2017]
Grant CEP: GA ČR GA17-14271S
Institucionální podpora: RVO:67985874
Klíčová slova: heterogeneous slurry * effect of pipe inclination * slip velocity * concentration distribution * gamma-ray radiometry
Obor OECD: Fluids and plasma physics (including surface physics)
https://www.epj-conferences.org/articles/epjconf/abs/2018/15/epjconf_efm2018_02120/epjconf_efm2018_02120.html

The effect of slurry velocity and mean concentration of heterogeneous particle-water mixture on flow behaviour and structure in the turbulent regime was studied in horizontal and inclined pipe sections of inner diameter D = 100 mm. The stratified flow pattern of heterogeneous particle-water mixture in the inclined pipe sections was revealed. The particles moved mostly near to the pipe invert. Concentration distribution in ascending and descending vertical pipe sections confirmed the effect of fall velocity on particle-carrier liquid slip velocity and increase of in situ concentration in the ascending pipe section. Slip velocity in two-phase flow, which is defined as the velocity difference between the solid and liquid phase, is one of mechanism of particle movement in two-phase flow. Due to the slip velocity, there is difference between transport and in situ concentrations, and the slip velocity can be determined from comparison of the in situ and transport concentration. For heterogeneous particle-water mixture flow the slip velocity depends on the flow structure.
Trvalý link: http://hdl.handle.net/11104/0277828