Modeling and Simulation of Commercial Slurry Flow through Pipeline Systems

Abstract

Slurry pipelines are widely used for transporting solid materials in various industries. Their efficiency depends on factors like pipeline geometry, pressure drop, concentration, and flow velocity. Solid particles can settle, causing sedimentation and blockages that increase power consumption. This study investigates slurry flow in 54.9 mm and 53 mm diameter pipelines using ANSYS Fluent. Glass bead slurry (and#961; = 2470 kg/m³) is modeled with the Eulerian approach and RNG k-and#949; turbulence model at Prandtl numbers 1.34 to 5.83, concentrations of 10% 50%, and velocities of 1 5 m/s for 125 µm and 440 µm particles. newlineResults show pressure drop increases with velocity and concentration, with better suspension at lower Prandtl numbers. Larger particles lead to higher pressure drops. Three drag models Syamlal-O Brien, Schiller-Naumann, and Gidaspow are evaluated. Syamlal-O Brien provides the most accurate predictions. A curve-fitted mathematical model is developed and validated for 75 150 µm particles, velocities of 1 5 m/s, and concentrations below 40%. Erosion due to slurry flow is studied in a mitre pipe bend using four models. Bottom ash slurry (and#961; = 2219 kg/m³) with particles of 162 445 µm shows peak erosion near the bend exit. The Generic model best matches experimental data, aiding pipeline bend design. newline newline