基于固-液界面传热的异质结冰过程模拟  

Heterogeneous Icing Process Under the Influence of Solid-Water Interfacial Heat Transfer

作　　者：王军[1] 张悦 朱星光 夏国栋[1] WANG Jun;ZHANG Yue;ZHU Xingguang;XIA Guodong(Beijing Key Laboratory of Heat Transfer and Energy Conversion,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学传热与能源利用北京市重点实验室,北京100124

出　　处：《北京工业大学学报》2025年第2期130-139,共10页Journal of Beijing University of Technology

基　　金：北京市教育委员会青年拔尖人才培养计划资助项目(CIT&TCD201904015)。

摘　　要：采用分子动力学模拟方法研究了基于固-液界面传热的铂表面异质结冰过程。结果表明,对于疏水表面而言,界面传热是影响结冰过程的主要因素。一方面,疏水表面的界面热阻较大,通过疏水表面将水冷却至低温所需的时间较长,因而增加了冰成核时间;另一方面,由于水分子在降温过程中可以逐渐排列成类冰结构,因此从形成冰核到液膜全部冻结的时间变短。对于亲水表面而言,固-液界面传热过程的影响较弱,固-液界面处较强的吸附作用可以诱导水分子排成类冰结构,是亲水表面促进结冰的主要原因。In this work,molecular dynamics simulation was employed to study the icing process on a platinum surface under the influence of the solid-water interfacial heat transfer.It is found that the heat transfer can play a significant role in the heterogeneous icing process,particularly for hydrophobic surfaces with weak interfacial bonding.The ice nucleation occurs slowly since the water molecules have to be cooled down by the interfacial heat transfer.However,the ice can grow faster on a surface with the effect of heat transfer,because the water molecules can be re-arranged in ice-like structure during the cooling period.As the interfacial bonding strength increases,the effect of interfacial heat transfer can be neglected,and the icing process can be enhanced,which is attributed to the high free energy barrier and weak diffusion effect.The findings in this paper provide an in-depth understanding of the effect of the interfacial bonding on the heterogeneous icing process.

关 键 词：界面传热 异质结冰 固-液结合强度 分子动力学模拟 成核率 润湿性 

分 类 号：TK124[动力工程及工程热物理—工程热物理]