Number of the records: 1
Pipe-wall friction in vertical sand-slurry flows
- 1.
SYSNO ASEP 0329161 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Pipe-wall friction in vertical sand-slurry flows Title Tření na stěně svislého potrubí při proudění pískových hydrosměsí Author(s) Matoušek, Václav (UH-J) ORCID, SAI, RID Source Title Particulate Science and Technology. - : Taylor & Francis - ISSN 0272-6351
Roč. 27, č. 5 (2009), s. 456-468Number of pages 13 s. Language eng - English Country US - United States Keywords slurry-flow experiment ; off-the-wall lift ; collisional stress ; solids friction ; pressure drop Subject RIV BK - Fluid Dynamics R&D Projects GA103/06/0428 GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access CEZ AV0Z20600510 - UH-J (2005-2011) UT WOS 000269120700006 DOI 10.1080/02726350903133179 Annotation The paper describes the results of extensive laboratory tests of vertical flows of three sand fractions (0.12-mm-, 0.37-mm-, and 1.84-mm sands) in a 150-mm pipe. The tests revealed an interesting phenomenon of a surprisingly low contribution of the medium sand to the total friction of the mixture flow in the vertical pipe. The frictional pressure drop in highly-concentrated flows at high velocities was lower for slurries of the medium sand than for slurries of both the fine sand and the coarse sand. The solids friction at the pipe wall is analyzed taking into account effects of particle-particle interactions and particle-liquid interactions in the boundary layer of a vertical flow of settling slurry. The analysis suggests that the observed phenomenon is associated with the hydrodynamic liquid-lift force acting on solid particles traveling near a pipe wall. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2010
Number of the records: 1