Hydraulic Transport of Fine and Coarse Sediment Mixtures in Pipelines

摘要

This paper presents results from a comprehensive laboratory study of the effects of a fine grained sediment (clay) carrier fluid on the hydraulic graient of sand-sized sediments (600-2,000 microns) in a 103-mm diameter pipeline. Three sand sizes were evaluated in the pipeline :(1) medium sand (670 microns), coarse sand (1,260 microns), and very coarse sand (2,040 microns). Initial experiments were conducted with water as the carrier fluid. Sand concentrations of 0.05 , 0.10, 0.20, and 0.30 by volume (C_v) were evaluated. For each sand concentration, the effect of phosphate clay concentrations on the hydraulic gradient was evaluated.