Direct Numerical Simulation of Particle Dispersion in Gas-Solid Compressible Turbulent Jets

作     者：罗坤 金军 郑友取 岑可法 LUO Kun;JIN Jun;ZHENG Youqu;CEN Kefa

作者机构：Institute for Thermal Power Engineering and CE & EE Zhejiang University Hangzhou 310027 China Department of Mechanical Engineering Zhejiang University of Science and Technology Hangzhou 310012 China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2005年第13卷第2期

页      面：161-166页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：Supported by the Natural Science Foundation of Zhejiang Province (No. 502047 and No. M503094)National Basic Research Program of China (No. 2003CB214500) 

主　　题：direct numerical simulation compressible turbulent jet coherent structure particle dispersion 

摘      要：A numerical method was developed to directly simulate the compressible, particle-laden turbulent *** fourth order compact finite difference schemes were used to discretize the space derivatives. The Lagrangian method was adopted to simulate the particle motion based on one-way coupling. It is found that the turbulent intensity profiles attain self-similar status in the jet downstream regions. At the Stokes number of 1, particles are concentrated largely in the outer boundaries of the large-scale vortex structures with the most uneven distribution and the widest dispersion in the lateral direction. Particles at the much smaller Stokes numbers are distributed evenly in the flow field, and the lateral dispersion is also considerable. Distribution of particles at much larger Stokes numbers is more uniform and the lateral dispersion becomes small. In addition, the inflow conditions have different effects on the particle dispersion. The direct numerical simulation (DNS) results accord with the previous experiments and numerical studies.