CFD Modeling of Liquid-solid Flow in a New Internal Spiral-Grooved Tube

Abstract

A computation fluid dynamics modeling of liquid-solid flow in a new internal spiral-grooved tube is carried out. the effects of liquid/solids superficial velocity (0.3m/s,0.5m/s,and0.7m/s) and the particle size (0.0005m,0.00075m, and 0.001m) on the flow features of the new spiral-grooved tube using the Eularian–Eularian method with the kinetic theory of granular flow are systematically studied. Numerical simulation results show that because of the internal spiral grooves and the difference between liquid density and solid particle density, solids accumulate to the center in tube, and secondary flow phenomenon appears. Flow velocity decreases from center to boundary of the tube along the radial direction. And the larger velocity and diameter are, the smaller the solids volume fraction near the wall and the higher the solids volume fraction in center of the tube are.