甲烷/乙烷混合工质纳米液膜蒸发传质特性的研究  

Study on themass transfer characteristics of methane/ethane mixture nanofluid film evaporation

作　　者：林小晨 丁鑫 李雅宁 兰志向 刘纳 张林阳 郭健翔[1] LIN Xiao-Chen;DING Xin;LI Ya-Ning;LAN Zhi-Xiang;LIU Na;ZHANG Lin-Yang;GUO Jian-Xiang(College of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266520,China;Qingdao Loushanhe Water Resources Co.,Ltd,Qingdao 266000,China)

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266520 [2]青岛娄山河水务资源有限公司,青岛266000

出　　处：《原子与分子物理学报》2025年第5期72-80,共9页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(51904325,52204039);山东省重点研发计划项目(2022CXPT051,2022RZB07055);山东省自然科学基金(ZR2022QB046)。

摘　　要：采用分子动力学模拟方法研究了五种不同配比甲烷/乙烷混合工质纳米液膜的汽化过程,从蒸发现象、能量变化、涨落耗散规律及相对分子汽化量四个方面分析了混合工质的蒸发传质特性.结果表明:混合工质纳米液膜中甲烷配比越大,汽化起始时间越早,汽化过程越剧烈,汽化的持续时间越短,固定吸附层越薄,模拟体系动能和势能的增量越小,乙烷的存在会抑制甲烷的汽化;由涨落耗散分析可得,甲烷配比越大,对乙烷汽化的促进作用越强,汽化弛豫时间越短,整体汽化速率越快,传质效果越好.A molecular dynamics approach was used to simulate the vaporizations of five nanofluid films with different methane/ethane mixture ratios.The evaporative mass transfer characteristics of mixed media were analyzed from four aspects:evaporation phenomenon,energy change,fluctuation and dissipation law,and relative molecular vaporization.The results show that the larger the methane ratio in the mixture nanofluid film,the earlier the onset of vaporization,the more intense the vaporization process,the shorter the duration of vaporization,the thinner the fixed adsorption layer,and the smaller the increment of kinetic and potential energy of the simulated system.The presence of ethane inhibits the vaporization of methane.From the fluctuation and dissipation analysis,the larger the methane ratio,the stronger the promotion of ethane vaporization,the shorter the relaxation time of vaporization,the faster the overall vaporization rate,and the better the mass transfer effect.

关 键 词：混合工质 纳米液膜 传热传质 涨落耗散 分子动力学模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]