摘要
用Ｌａｇｒａｎｇｅ方法推导了固体小颗粒在湍流场中的无因次运动方程，给出了该方程的一个线性微分方程形式。求解了颗粒在湍流场中的湍流运动特性，包括颗粒的能量频谱、颗粒速度方均值、Ｌａｇｒａｎｇｅ相关函数及颗粒的湍流扩散，同时给出了颗粒线性微分运动方程的通解。
A dimensionless equation for partkicle motion in a turbulent flow field is derived by La-grange's method.It is given in the form of a linear differential equation. By a spectral analy-sis,Fourier transform,and ensemble average and time average of some parameters,the mo-tion characteristics of particles, including the particle energy spectrum,mean-square veloci-ty,and Lagrangian autocorrelation function as well as particle turbulent diffusivity are stud-ied.The general solution for the linear differential equation of motion is given.
出处
《华中理工大学学报》
CSCD
北大核心
1994年第10期45-50,共6页
Journal of Huazhong University of Science and Technology
基金
国家教委博士点基金
关键词
颗粒
颗粒运动
湍流场
拉格朗日法
Lagrange's method
turbulent flow
particles
motion
