摘要
本文采用双流体模型,引入颗粒动力学理论,对提升管内的稠密气粒两相流动进行了大涡模拟。采用改进的分步投影法对滤波后的方程进行显式求解,小尺度量采用Smagorinsky亚格子模式模拟。模拟结果给出的颗粒相速度分布、浓度分布与实验值基本吻合,气固两相存在速度滑移。模拟结果合理预报出了提升管内的环-核流动结构。
Based on the two-fluid modei, large eddy simulation (LES) with two-way coupling is performed for two-dimensional gas-particle flow in a riser. The kinetic theory of granular medium is introduced to describe the particle fluctuation behaviours. The motions of small-scale structures of the two phases are both described by Smagorinsky SGS modei. The predicted time-averaged results are in reasonable agreement with the experimental data, which well depict the non-uniform distributions of the particles in both ax...
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2004年第S1期75-78,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50376028)
关键词
大涡模拟
气粒两相流动
提升管
large eddy simulation
gas-particle flows
riser
