Promoting rebound of impinging viscoelastic droplets on heated superhydrophobic surfaces

doi:10.1088/1367-2630/abcacf

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	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
发表期刊	NEW JOURNAL OF PHYSICS
	2020-12-01
卷号	22 期号:12 页码:123001
ISSN	1367-2630
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.
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
DOI	10.1088/1367-2630/abcacf
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000596719700001
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
项目资助者	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}
论文分区	二类/Q1
力学所作者排名	4
RpAuthor	Chen, LQ ; Joo, SW
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85412
专题	非线性力学国家重点实验室
作者单位	1.{Li Bin, Lin Shiji, Wang Yile, Chen Longquan} Univ Elect Sci & Technol China Sch Phys Chengdu 610054 Peoples R China 2.{Li Bin, Joo Sang W.} Yeungnam Univ Sch Mech Engn Gyongsan 38541 South Korea 3.{Yuan Quanzi} Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China 4.{Yuan Quanzi} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 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.Rp_Au:Chen, LQ, Joo, SW
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.

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