CFD simulation of slurry flow in annular pipelines
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© 2017 Author(s). Three-dimensional CFD modeling of two-phase slurry flows is demonstrated in this paper. The flow domain consists of a vertically oriented annular pipe with outer and inner diameter of 0.125 m and 0.025 m, respectively. A mixture velocity range of 0.0738-0.197 m/s and overall volumetric concentration range of 0.8%-1.8% with 0.23 mm grain size (dp) are used for the simulation. Eulerian model with Reynolds Stress Model (RSM) for turbulence closure is adopted to analyze the monodispersed sand particles of varying granular diameters. The objective of this work is to study the slurry flow using CFD simulation and validating the simulation with experimental studies available in the literature. The simulated pressure losses are found to be in good agreement with experimental results at different conditions. Pressure drop per meter or pressure gradient increases with flow velocity of mixture but after a peak point pressure gradient decreases with the increasing velocity. These phenomena in vertical annular flow and its reasons are described in this paper. Effects of efflux solid concentration of slurry on pressure gradient is also studied.
author list (cited authors)
Sultan, R. A., Rahman, M. A., Rushd, S., & Zendehboudi, S.