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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Gas-Phase Flow and Diffusion Analysis of the Droplet-Train/Flow-Reactor Technique for the Mass-Accommodation Processes
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Gas-Phase Flow and Diffusion Analysis of the Droplet-Train/Flow-Reactor Technique for the Mass-Accommodation Processes

机译：大规模适应过程中液滴-流/流反应器技术的气相流和扩散分析

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摘要

While the droplet-train/flow-reactor method is one of the most powerful experimental techniques to study mass-accommodation kinetics at liquid-vapor interfaces, relatively little is understood about the gas-phase diffusion resistance in the flow tube, an important ingredient to the overall uptake kinetics. In this paper, we theoretically examined the gaseous resistance by numerically solving the coupled-diffusion equation and fluid dynamics in the flow tube. The results indicate that the gaseous resistance for the train of droplets significantly deviates from that for a single spherical droplet because of the interference among the droplets and the flow effect. The dependences of the gaseous transport on varying droplet velocity and orifice frequency are examined and quantitatively elucidated on the basis of the calculated data. This paper suggests that an accurate formula for the gas-phase diffusion resistance is desirable, particularly for the quantitative evaluation of the mass-accommodation coefficients of liquids having substantial vapor pressures.
机译：虽然液滴/流动反应器方法是研究液体-蒸汽界面处的质量适应动力学的最强大的实验技术之一，但对于流管中的气相扩散阻力（对总体吸收动力学。在本文中，我们通过数值求解耦合扩散方程和流量管中的流体动力学理论上检查了气体阻力。结果表明，由于液滴之间的干扰和流动效应，液滴序列的气体阻力显着不同于单个球形液滴的气体阻力。根据计算的数据检查并定量阐明了气体传输对液滴速度和孔口频率变化的依赖性。本文提出了一种准确的气相扩散阻力公式，特别是对于具有较大蒸气压的液体的质量容差系数的定量评估而言。

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