化工学报2016，Vol.67Issue(7)：2784-2792,9.DOI:10.11949/j.issn.0438-1157.20151888
不同浸润性冷表面上水滴碰撞结冰的数值模拟
Numerical simulation of droplet impinging and freezing on cold surfaces with different wettability
摘要
Abstract
A strategy is presented to simulate the impact and solidification of the water droplet on different substrates. Simulations were performed using a coupled volume-of-fluid and level-set method to tracking the air-water interface and an enthalpy-porosity method to capture the phase transition. Three surface types were investigated: hydrophilic surface (contact angle 30°), hydrophobic surface (contact angle 114°) and superhydrophobic surface (contact angle 163°). The results showed that decreasing the wettability would reduce the contact time and area with the cold surface, and delay the freezing of the droplet. When temperature of the surface is higher than −15℃, the superhydrophobic surface can remain entirely ice-free under the simulated conditions. By comparing the maximum droplet spread, retraction response and time for solidification with the experimental results, the effectiveness and precision of the simulation strategy were demonstrated.关键词
表面/液滴碰撞/动力学/多相流/相变/数值模拟Key words
surface/droplet impact/dynamic behavior/multiphase flow/phase change/numerical simulation分类
能源科技引用本文复制引用
冷梦尧,常士楠,丁亮..不同浸润性冷表面上水滴碰撞结冰的数值模拟[J].化工学报,2016,67(7):2784-2792,9.基金项目
国家重点基础研究发展计划项目（2015CB755803）；国家自然科学基金项目（11372026）。基金项目国家重点基础研究发展计划项目（2015CB755803）；国家自然科学基金项目（11372026）。@@@@supported by the National Basic Research Program of China (2015CB755803) and the National Natural Science Foundation of China (11372026) （2015CB755803）
