0422066 - ÚH 2014 RIV US eng J - Journal Article
Vlasák, Pavel - Kysela, Bohuš - Chára, Zdeněk
Fully stratified particle-laden flow in horizontal circular pipe.
Particulate Science and Technology. Roč. 32, č. 2 (2014), s. 179-185. ISSN 0272-6351. E-ISSN 1548-0046.
[7th International Conference for Conveying and Handling of Particulate Solids (CHoPS). Friedrichshafen, 10.09.2013-13.09.2012]
R&D Projects: GA ČR GAP105/10/1574
Institutional support: RVO:67985874
Keywords : coarse-grained slurry * flow structure * liquid local velocity * particle velocity * PIV
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 0.523, year: 2014

The paper describes the results of an experimental measurement and visualization of coarse-grained fully stratified particle-water mixtures. The paper is focused on the study of the carrier liquid velocity field and behavior and local velocities of conveyed particles. Glass balls and graded pebble gravel of 6 mm mean diameter were conveyed by water in a horizontal smooth pipe loop with a transparent pipe viewing section of inner diameter 40 mm. The measurements were performed in the smooth pipe and the pipe with rough stationary bed created by two layers of spherical particles of the same mean diameter as the conveyed particles. Particle movement along the pipe bottom was studied and the effect of the stationary bed on local velocity values of the carrier liquid and conveyed particles were evaluated. It was concluded that in the flow with stationary bed the maximum liquid velocity is markedly shifted from the pipe center to its top. The coarse-grained particles moved principally in a layer close to the pipe invert, for higher flow velocities particle saltation becomes the dominant mode of transport.
Permanent Link: http://hdl.handle.net/11104/0232875