Numerical simulation of turbulent gas-particle fluid flow and heat transfer

A computer code using an algebraic second-order closure model (ASM) for the continuous phase, and a stochastic separation flow model (SSF) for the particulate phase is used to investigate the microscopic and macroscopic fluid dynamic and heat transfer behaviors of the gas-particulate mixture flow. The authors confirm the validity of this code for a single-phase impinging wall jet flow, and then apply it to a gas-particulate flow through a circular pipe. The variables are the particle size, loading ratio, Reynolds number, and the pipe diameter. Some preliminary results concerning the particle size and Reynolds number are described. The velocity profiles, turbulence quantities, and temperature distributions are obtained and are compared with the experimental ones. It is found that this code can be applied to the gas-particle flow simulation in a pipe. However, it is necessary to carry out further calculations and investigate the physical mechanism and the modeling of this gas-particle flow and heat transfer phenomena in order to obtain a full understanding