Development of Two-Phase Turbulence Models For Simulating Dense Gas-Particle Flows in China

摘要

Different two-phase turbulence models accounting for both particle turbulence and inter-particle collision for simulating dense gas-particle flows, including the k-ε-kp-Θ model, k-ε-kp-εp-Θ model, k-ε-kp-k_(pg)-Θ model, USM-Θ model and two-scale USM model, are proposed and developed in China. The proposed models are applied to simulate dense gas-particle flows in downers, risers and horizontal channels and the simulation results are compared with experimental results. It is shown that all of these models can well or fairly well simulate particle velocity and concentration distribution, but among them the USM-Θ model and two-scale USM model, accounting for anisotropic particle turbulence and particle-particle collision and using the transport equation models of two-phase velocity correlation are better than other models in simulating the particle turbulence properties—particle Reynolds stress components.