摘要
对轴对称突扩通道内气粒两相湍流进行了数值模拟研究 ,其中对气相场采用常用的二阶矩模型 ,对颗粒相采用了PDF模型 ,在此基础上给出了一种改进的漂移系数模型 ,用所给出的封闭模型进行了数值计算 ,并与实验结果以及未采用改进模型的PDF模拟结果进行了对比 ,结果表明改进模型能够更准确地预报颗粒脉动 。
A numerical simulation of gas-particle two-phase tu rb ulent flows in an axial symmetry suddenly expanded channel was studied. An ordin ary second order moment model was used in gas phase, a PDF model in particle pha se. A modified drift coefficient model was presented and a numerical computation was made. The result was compared with that of the experiments from an old PDF model. It is seen that the modified model can predict the particles′ fluctuatio n more correctly than the old one, and it can embody the anisotropism of particl es′motion.
出处
《华中科技大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2003年第6期60-62,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家重大基础研究专项经费资助项目 (G19990 2 2 2 07)
国家自然科学基金资助项目 (5 0 0 0 60 0 3 )
关键词
两相湍流
二阶矩模型
PDF模型
时间尺度
two-phase turbulent flow
second order mome nt (SOM) model
PDF model
time scale