Maximum spreading of liquid drops impacting on groove-textured surfaces: Effect of surface texture

Langmuir : the ACS Journal of Surfaces and Colloids
Visakh Vaikuntanathan, D Sivakumar

Abstract

Maximum spreading of liquid drops impacting on solid surfaces textured with unidirectional parallel grooves is studied for drop Weber number in the range 1-100 focusing on the role of texture geometry and wettability. The maximum spread factor of impacting drops measured perpendicular to grooves, βm,⊥ is seen to be less than that measured parallel to grooves, βm,‖. The difference between βm,⊥ and βm,‖ increases with drop impact velocity. This deviation of βm,⊥ from βm,‖ is analyzed by considering the possible mechanisms, corresponding to experimental observations, - (1) impregnation of drop into the grooves, (2) convex shape of liquid-vapor interface near contact line at maximum spreading, and (3) contact line pinning of spreading drop at the pillar edges - by incorporating them into an energy conservation-based model. The analysis reveals that contact line pinning offers a physically meaningful justification of the observed deviation of βm,⊥ from βm,‖ compared to other possible candidates. A unified model, incorporating all the above-mentioned mechanisms, is formulated which predicts βm,⊥ on several groove-textured surfaces made of intrinsically hydrophilic and hydrophobic materials with an average error of 8.3%. The effect of...Continue Reading

References

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Dec 2, 2004·Journal of Colloid and Interface Science·Yong ChenNeelesh A Patankar
Jan 12, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Chijioke Ukiwe, Daniel Y Kwok
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Oct 4, 2012·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·V Vaikuntanathan, D Sivakumar
Aug 27, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Tanmoy MaitraDimos Poulikakos

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Citations

Dec 15, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Binyu ZhaoXu Deng
Dec 31, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Wu-Zhi Yuan, Li-Zhi Zhang
Apr 28, 2018·Soft Matter·Jeonghoon HanChoongyeop Lee
May 28, 2019·Scientific Reports·Yaerim LeeJunichiro Shiomi
Oct 23, 2019·Scientific Reports·Miguel A Quetzeri-SantiagoJ Rafael Castrejón-Pita
Mar 3, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Rajeev Kumar SinghSubrat Das
Jun 4, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Derek BreidSachin S Velankar
Jun 12, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Jiayu DuXinxin Wu
Jan 29, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Fujun WangTiegang Fang
Jun 11, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Brooklyn A Noble, Bart Raeymaekers
Aug 14, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Cong LiuYahua Liu
Aug 29, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Laxman K MallaAdrian Neild
Feb 14, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Chunfang GuoYahua Liu
Sep 2, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Susumu YadaShervin Bagheri

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