化工学报2017，Vol.68Issue(6)：2473-2482,10.DOI:10.11949/j.issn.0438-1157.20161518
单液滴撞击超疏水冷表面的反弹及破碎行为
Rebounding and splashing behavior of single water droplet impacting on cold superhydrophobic surface
摘要
Abstract
Dynamic behavior of a single water droplet with 2.8 mm in diameter impacting on cold surface was visually observed by high speed camera, the evolutional characteristics of water droplet impacting on cold superhydrophobic and bare aluminum surfaces were comparatively studied. Besides, the effect of initial impacting velocity and cold surface temperatures on the dynamic behavior of water droplet on cold surface were analyzed. The experimental result showed that compared with the instantly freezing of water droplet impacting on cold bare aluminum surface, the water droplet impacting on cold superhydrophobic surface (-25—-5℃) can not freeze along with spreading, retraction, rebound and smash behaviors. The higher the impacting velocity is, the bigger the spreading factor is and the more easily the water droplet freezes on cold bare aluminum surface. Moreover, rebounding behavior can be found when droplet impacts on the superhydrophobic surface with a low speed (We≤76) and velocity has no effect on the maximum spreading time. Also, obvious droplet fingers will appear and can be fragmented into many satellite droplets as droplet impacts on cold superhydrophobic surface with a high speed (We≥115). In addition, cold surface temperature has obvious effect on rebounding height but has little effect on the spreading factor and spreading time. The results indicate that the superhydrophobic surface can prevent the water droplet effectively from freezing instantly as the droplet impacts on cold surface.关键词
超疏水/冷表面/铺展因子/反弹/破碎/成像/动力学/数值分析Key words
superhydrophobic/cold surface/spreading factor/rebounding/splashing/tomography/kinetics/numerical analysis分类
能源科技引用本文复制引用
李栋,王鑫,高尚文,谌通,赵孝保,陈振乾..单液滴撞击超疏水冷表面的反弹及破碎行为[J].化工学报,2017,68(6):2473-2482,10.基金项目
江苏省自然科学基金青年项目(BK20150979) （BK20150979）
江苏省高校自然科学研究面上项目(15KJB470009).supported by the Youth Project of Natural Science Foundation of Jiangsu Province(BK20150979) and the Natural Science Foundation of College in Jiangsu Province(15KJB470009). （15KJB470009）
