Promoting rebound of impinging viscoelastic droplets on heated superhydrophobic surfaces

doi:10.1088/1367-2630/abcacf

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Promoting rebound of impinging viscoelastic droplets on heated superhydrophobic surfaces
	Li B ; Lin SJ ; Wang YL ; Yuan QZ(袁泉子); Joo SW ; Chen LQ
刊名	NEW JOURNAL OF PHYSICS
	2020-12-01
卷号	22 期号:12 页码:123001
关键词	droplet impact IMPACT DYNAMICS viscoelastic filaments WATER DROPS superhydrophobic surface AIR heat transfer SPRAY contact time ATOMIZATION restitution coefficient TRANSITIONS DEPOSITION TIME
ISSN号	1367-2630
DOI	10.1088/1367-2630/abcacf
英文摘要	The rebound of impinging droplets is a defining characteristic of superhydrophobic surfaces; yet, such an intriguing interfacial phenomenon can be effectively suppressed by adding a tiny amount of flexible polymers to induce non-Newtonian viscoelastic properties. In this work, however, we demonstrate the promoting effects of surface heating on the rebound of impinging viscoelastic droplets on superhydrophobic surfaces. The underlying mechanism for the promotion is that the local heat transfer at the liquid-solid interface causes the fast evaporation of the liquid and thus the breakup of the formed viscoelastic filaments, which hinder droplet recoiling. Therefore, the lower threshold velocity for rebound increases while the upper threshold velocity for rebound suppression decreases with increasing surface temperature, resulting in a wider regime for droplet rebound in the impact phase diagram. The surface heating effect on liquid-solid interactions also leads to a nontrivial dependence of the contact time on the impact velocity and a linear decrease of the restitution coefficient with the Weber number for diverse bouncing viscoelastic droplets, which can be rationalized by coupling the interfacial force and energy analyses. We envision that these findings would be useful in technological processes requiring control the retention of viscoelastic liquids on solid surfaces.
分类号	二类/Q1
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000596719700001
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11772271} ; Opening fund of State Key Laboratory of Nonlinear Mechanics ; National Research Foundation of KoreaNational Research Foundation of Korea [NRF-2018R1A2B3001246}
其他责任者	Chen, LQ ; Joo, SW
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/85412]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.{Yuan Quanzi} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China 2.{Li Bin, Lin Shiji, Wang Yile, Chen Longquan} Univ Elect Sci & Technol China Sch Phys Chengdu 610054 Peoples R China 3.{Li Bin, Joo Sang W.} Yeungnam Univ Sch Mech Engn Gyongsan 38541 South Korea 4.{Yuan Quanzi} Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China
推荐引用方式 GB/T 7714	Li B,Lin SJ,Wang YL,et al. Promoting rebound of impinging viscoelastic droplets on heated superhydrophobic surfaces[J]. NEW JOURNAL OF PHYSICS,2020,22(12):123001.
APA	Li B,Lin SJ,Wang YL,袁泉子,Joo SW,&Chen LQ.(2020).Promoting rebound of impinging viscoelastic droplets on heated superhydrophobic surfaces.NEW JOURNAL OF PHYSICS,22(12),123001.
MLA	Li B,et al."Promoting rebound of impinging viscoelastic droplets on heated superhydrophobic surfaces".NEW JOURNAL OF PHYSICS 22.12(2020):123001.