高校化学工程学报2017，Vol.31Issue(3)：570-578,9.DOI:10.3969/j.issn.1003-9015.2017.00.028
液滴碰撞液膜复合level set-VOF法的数值分析
Numerical Analysis of a Coupled Level Set-VOF Method for the Study of Droplet Impact on Wetted Surface
摘要
Abstract
Droplet impact on wetted surface is a widely existed phenomenon in spray control applications, while the mechanism of dynamic motion and heat transfer during impact is not well addressed. A numerical model was developed using a CLSVOF method and the model was validated by experiments. Effects of impacting velocity on droplet motion morphology, impacting dynamic and heat transfer were analyzed, and the mechanism of flow and heat transfer during impact was revealed. The results show that droplets present waving, crown jet and splash as impacting velocity increases. Splashing becomes more obvious when the impacting velocity increases. Pressure gradient inside droplets is the main factor that results in droplet spreading, liquid jet formation and splash. Shear action of surrounding air and capillary wave result in shrink, breakup and splash of the liquid sheet. Spreading factor, dimensionless jet height and maximum average wall heat flux increase with the increase of impacting velocity, while dimensionless height of central liquid surface decreases. Effects of impacting velocity on maximum average wall heat flux become less important as Reynolds number increases.关键词
液滴碰撞液膜/铺展系数/动力学/传热Key words
droplet impact on liquid film/spreading factor/dynamic behavior/heat transfer分类
能源科技引用本文复制引用
李大树,仇性启,郑志伟,张铎..液滴碰撞液膜复合level set-VOF法的数值分析[J].高校化学工程学报,2017,31(3):570-578,9.基金项目
国家高技术研究发展计划项目(2013AA092602) （2013AA092602）
中央高校基本科研业务费专项资金项目(15CX06052A). （15CX06052A）
