Thermal and mass transfer resistance at a liquid-gas interface of an evaporating droplet: A molecular dynamics study
Thermal and mass transfer resistance at a liquid-gas interface of an evaporating droplet: A molecular dynamics study
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蒸发液滴液-气界面的传热和传质阻力：分子动力学研究
DOI：
10.1016/j.ijheatmasstransfer.2022.122867
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发表时间：
2022
影响因子：
5.2
通讯作者：
Liang, Zhi
中科院分区：
文献类型：
--
作者：
Gutierrez Plascencia, Jesus;Bird, Eric;Liang, Zhi
在液-气界面处的传热和传质阻力可以强烈地影响微/纳米液滴的蒸发。气液界面传热传质研究的难点之一是在蒸发液面上存在两种传热模式，即蒸发和导热。在分析液滴蒸发过程中，界面热传导往往被忽略。在这项工作中，我们推导出的热量和质量流的阻力通过液-气界面的蒸发液滴的气体动力学理论的解析表达式，并验证了理论预测，通过比较它们的分子动力学模拟结果。模拟结果表明，蒸发液滴表面的温度跃变主要与界面热传导有关，而与蒸发无关，液-气界面附近的蒸汽密度由传质阻力决定，即，蒸发，在界面处。使用的界面传热和传质阻力的表达式，我们制定的温度跳跃和蒸汽密度的边界条件在蒸发液滴表面和确定的情况下，连续的温度分布和饱和蒸汽在液-气界面的传统假设变得无效。
Thermal and mass transfer resistance at a liquid-gas interface could strongly affect the evaporation of a micro/nanodroplet. One of the challenges in the investigation of heat and mass transfer across liquid-gas interfaces is that there are two heat transfer modes, namely, evaporation and heat conduction, at an evaporating liquid surface. Interfacial heat conduction was often overlooked in the analysis of evaporation of a liquid droplet. In this work, we derive the analytical expressions for the resistance to the heat and mass flow across a liquid-gas interface of an evaporating droplet from the kinetic theory of gases and verify the theoretical predictions by comparing them to molecular dynamics simulation results. The modeling results show that the temperature jump across the evaporating droplet surface is mainly associated with interfacial heat conduction rather than evaporation, and the vapor density near the liquid-gas interface is determined by the resistance to mass transfer, i.e., evaporation, at the interface. Using the expressions for interfacial thermal and mass transfer resistance, we formulate the temperature jump and vapor density boundary conditions at an evaporating droplet surface and determine the scenario under which the conventional assumptions of continuous temperature profile and saturated vapor at the liquid-gas interface become invalid.
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影响因子：
2.7
作者：
E. Bird;Eric Smith;Zhi Liang
通讯作者：
E. Bird;Eric Smith;Zhi Liang
影响因子：
4.6
作者：
E. Bird;Jun Zhou;Zhi Liang
通讯作者：
E. Bird;Jun Zhou;Zhi Liang
DOI：
10.1016/j.ijheatmasstransfer.2021.122285
发表时间：
2022
影响因子：
5.2
作者：
Bird, Eric;Gutierrez Plascencia, Jesus;Keblinski, Pawel;Liang, Zhi
通讯作者：
Liang, Zhi
影响因子：
3.2
作者：
A. McGaughey;C. A. Ward
通讯作者：
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