This paper puts forward conceptions of dangerous Angle and bottom-thicknesscoefficient for the first time, gives out relation curves between them and makes analysis with actual examples.
首次提出了危险角度及底厚系数概念，并给出了它们之间的关系曲线。文末进行了实例分析。
2
The mass transfer equation was introduced into heat transfer model of falling film evaporation. The radial velocity, mass diffusion coefficient and variation of film thickness were taken into account.