Numerical simulation of the gas-particle turbulene flow in riser reactor based on k-#epsilon#-k_p-#epsilon#_p-#THETA# two-fluid model

摘要

A k-#epsilon#-k_p-#epsilon#_p-#THETA# two-fluid modcl is established to simulate thegas-article turbulent flow in the riser section of a circulating fluidized bed (CFB) reactor. The model, based on the kinetic theory of granular flow simulates both the gas phase and particle phase by low Reynolds number turbulent model, taking into account the trubulent interaction between gas and particles. The model is coded and solved using a computational fluid dynamic software package CFX4 by AEAT to simulate the two-dimensional, isothermal flow in a riser reactor. The predicted results show satisfactory agreements with experimental data. Moreover, the detailed analysis indicates that the interaction between the turbulence of ga sand that of particles is a crucial factor that influences the predicted results.