传统的研究者一般用水分子间的碰撞速度来表示水的蒸发速度，此外再乘上一个叫做“蒸发系数”（evaporation coefficient）的修正因子，这个系数的值在0到1之间。
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groundwater evaporation coefficient 潜水蒸发系数
evaporation coefficient of large area 大面积蒸发系数
phreatic evaporation coefficient 潜水蒸发系数
the soil evaporation coefficient 土壤蒸发系数
correction of evaporation coefficient 系数订正法
water surface evaporation coefficient 水面蒸发系数
phreatic water evaporation coefficient 潜水蒸发能力系数
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.
将传质方程引入到垂直管降膜蒸发传热模型中，求解时考虑了径向速度、质量扩散系数和膜厚变化对传热的影响。
In this thesis, the heat transmission coefficient and exit density of two-effect evaporation experimental facility are investigated.
本文以两效蒸发实验装置的传热系数和出口浓度在线检测系统为研究对象。
The influence factors of the heat transfer performance and the formula of the heat transfer coefficient on the evaporation side in the umbrella-plate have been obtained.
分析了影响伞板式降膜蒸发器传热的主要因素，得到了伞板降膜蒸发侧无因次传热系数的实验关联式；
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