Different types of unsteady flow of solids generated in laboratory slurry pipe loop

0397370 - ÚH 2014 RIV DE eng C - Conference Paper (international conference)
Matoušek, Václav - Krupička, Jan
Different types of unsteady flow of solids generated in laboratory slurry pipe loop.
16th International Conference on Transport & Sedimentation of Solid Particles - Proceedings. Rostock: University of Rostock, 2013 - (Sobota, J.; Eckstädt, H.), s. 19-31. ISBN 978-83-927084-9-0. ISSN 1232-3071.
[16th International conference transport and sedimentation of solid particles. Rostock (DE), 18.09.2013-20.09.2013]
R&D Projects: GA ČR GA103/09/0383
Institutional support: RVO:67985874
Keywords : density wave * flow stratification * slurry flow * bed load * hydraulic transport
Subject RIV: BK - Fluid Dynamics

Three different types of unsteady flow of solids (flow with dunes at the top of a stationary bed, flow with density waves due to an unstable slip point of a bed, flow with a sliding bed exhibiting a restratification effect) observed during lab loop tests are discussed. Special attention is focused to the density waves and to the restratification effect. It seems that both phenomena are associated with secondary current generated in the pipe loop and interacting with a granular bed in the stratified flow. However, more detailed experimental investigation is required to indentify mechanisms that govern generation and development of the observed flows.
Permanent Link: http://hdl.handle.net/11104/0229303