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。
Based on the model test, the instantaneous concentration and velocity images in different temperatures and scales are put forwarded. And the range, shape and trend of diffusion are acquired.
本文结合模型试验，得出了不同温升及变率下表面横向浮射流的瞬时浓度场和流速场，进而分析得出随着温度及变率的变化浓度场的扩散范围、形态特点和趋势。
The diffusion trapping efficiency and inertia collision trapping efficiency are calculated under different gas flowing velocity, particulate size and ceramic foam parameter using the numerical model.
通过模拟计算，分析了气体流速、微粒粒径、泡沫陶瓷微孔参数对微粒扩散拦截和惯性碰撞拦截效率的影响。
The mixing layer flow was numerically simulated by the discrete vortex method, in which the diffusion velocity method was adopted to model the viscosity.
对混合层流动进行了数值模拟。采用了离散涡方法。计算中采用扩散速度法处理粘性作用项。
The calculated exemplum by using this model indicates that experimental regression constant in the diffusion coefficient equation varies with the flow velocity of fluid and ranges from 0.014 to 0.020.
研究结果表明，颗粒扩散系数方程中的实验回归系数应考虑成流速的函数，取值范围为0.014～0。 020；
The calculated exemplum by using this model indicates that experimental regression constant in the diffusion coefficient equation varies with the flow velocity of fluid and ranges from 0.014 to 0.020.
研究结果表明，颗粒扩散系数方程中的实验回归系数应考虑成流速的函数，取值范围为0.014～0。 020；
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