摘要
作者利用三维分子热运动模型统计得到分子热运动平均速度和分子平均自由程,以及分量和总量之间的关系;运用传递通量概念,推导动量通量、热量通量和质量通量表达式,并与牛顿黏性定律、傅立叶导热定律和费克分子扩散定律进行对比,获得了气体动力学理论结论。
In this paper,the average velocity of molecular thermal motion and the average free path of molecule,as well as the relationship between component and total amount,are obtained by means of three-dimensional molecular thermal motion model.By using the concept of transfer flux,the expressions of momentum flux,heat flux and mass flux are derived and compared with Newton’s viscosity law,Fourier heat conduction law and Feck molecular diffusion law,and the theoretical conclusions of gas dynamics are obtained.
作者
孙志仁
Sun Zhiren(School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237)
出处
《化工高等教育》
2020年第2期141-146,共6页
Higher Education in Chemical Engineering
关键词
分子热运动
统计模型
分子热运动平均速度
分子平均自由程
传递通量
Molecular thermal movement
Statistical model
Average velocity of molecular thermal motion
Molecular average free path
Transfer flux
