| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 235822 | Powder Technology | 2014 | 10 Pages |
•We model concentration profiles in stratified slurry flows in pipe.•We compare model predictions with experimentally determined profiles.•Proportions of contact load and suspended load are determined in flowing slurry.•Sliding bed develops under suitable conditions given by shear stress distribution.
A one-dimensional profile of solids concentration is modeled 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. A model 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.
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