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Understanding the flow behavior of complex concentrated slurries is oftremendous importance for industrial waste management. In this study, thetransport of three-phase oil sands tailings in a horizontal pipeline issimulated via the mixture multiphase model coupled with the kinetic theory ofgranular flow. The solid particles and bitumen droplets are conveyed via anon-Newtonian carrier fluid in a turbulent regime inside an industrial-scalepipeline. The simulation results showed exceptional agreement with the fielddata, with errors of <3.5% for velocity distribution and <15% for the pressuredrop. A systematic parametric investigation was performed for a wide range offlow conditions, showing that the majority of bitumen droplets reside at thetop region of the pipe. Our findings may help design an effective process forthe separation of bitumen residues during pipeline transport.

Computational fluid dynamics (CFD) simulation of three-phase non-Newtonian slurry flows in industrial horizontal pipelines