One-dimensional modeling of concentration distribution in pipe flow of combined-load slurry

0428308 - ÚH 2015 RIV CH eng J - Journal Article
Matoušek, Václav - Krupička, Jan
One-dimensional modeling of concentration distribution in pipe flow of combined-load slurry.
Powder Technology. Roč. 260, July (2014), s. 42-51. ISSN 0032-5910. E-ISSN 1873-328X
R&D Projects: GA ČR GA103/09/0383
Institutional support: RVO:67985874
Keywords : hydraulic transport * sediment transport * two-phase flow * experiment * bed shear
Subject RIV: BK - Fluid Dynamics
Impact factor: 2.349, year: 2014

A one-dimensional profile of solids concentration ismodeled in a cross section of partially stratified flow of slurry in a pipe. In the flow, a certain proportion of solids is transported as contact load and occupies a sliding bed and a transport layer above the bed. The rest of solid particles is transported as suspended load within and above the transport layer.Amodel based on a vertical distribution of shear stress is proposed to predict a concentration profile in a cross section of such flow. Besides the concentration profile, the model predicts the thickness and velocity of the bed. Furthermore, the model determines a vertical position of the top of the transport layer and a position of the hydrodynamic axis of the flow. Model predictions show a satisfactory match with new experimentally determined profiles collected in slurry flows of four different fractions of glass beads in a 100-mm pipe of our laboratory loop.
Permanent Link: http://hdl.handle.net/11104/0233669