Experimental and Numerical Study of Dilute Gas-Solid Flow inside a 90° Horizontal Square Pipe Bend

Abstract

A pneumatic test rig is built to test a curved 90˚ square bend in an open-circuit horizontal-to-horizontal suction wind tunnel system. Sand particles are used to represent the solid phase with a wide range of particle diameters. Velocity profiles are constructed by measuring the gas velocity using a 3-hole probe. Flow patterns inside the bend duct are introduced using sparks caused by burning sticks of incense with the air flow inside the piping system for flow visualization purpose. Numerical calculations are performed by Lagrangian-particle tracking model for predicting particle trajectories of dispersed phase, and standard kε model for predicting the turbulent gas-solid flows in bends. Comparisons made between the theoretical results and experimental data for the velocity vectors and particle trajectories show good agreement.

Numerical Simulation of Gas-Particles Two Phase Flow in Pipe of Complex Geometry: Pneumatic Conveying of Olive Cake Particles Toward a Dust Burner

“…Based in many previous studies [2] [6][7][8][9][10], flow behavior of the conveying process in gas-solid system within pipe bends is much related to characteristic parameters of particles such as size, density and mass loading ratio and geometries configurations.…”