Splashing Threshold of Oblique Droplet Impacts on Surfaces of Various Wettability

Langmuir : the ACS Journal of Surfaces and Colloids
Damon G K Aboud, Anne-Marie Kietzig

Abstract

Oblique drop impacts were performed at high speeds (up to 27 m/s, We > 9000) with millimetric water droplets, and a linear model was applied to define the oblique splashing threshold. Six different sample surfaces were tested: two substrate materials of different inherent surface wettability (PTFE and aluminum), each prepared with three different surface finishes (smooth, rough, and textured to support superhydrophobicity). Our choice of surfaces has allowed us to make several novel comparisons. Considering the inherent surface wettability, we discovered that PTFE, as the more hydrophobic surface, exhibits lower splashing thresholds than the hydrophilic surface of aluminum of comparable roughness. Furthermore, comparing oblique impacts on smooth and textured surfaces, we found that asymmetrical spreading and splashing behaviors occurred under a wide range of experimental conditions on our smooth surfaces; however, impacts occurring on textured surfaces were much more symmetrical, and one-sided splashing occurred only under very specific conditions. We attribute this difference to the air-trapping nature of textured superhydrophobic surfaces, which lowers the drag between the spreading lamella and the surface. The reduced drag a...Continue Reading

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Citations

Mar 10, 2016·ACS Applied Materials & Interfaces·Edwin Jee Yang LingPhillip Servio
Jun 30, 2016·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Kerstin Koch, Roland Grichnik
Jul 28, 2016·Scientific Reports·Patricia B WeisenseeWilliam P King
Feb 16, 2017·Soft Matter·H Almohammadi, A Amirfazli
Mar 23, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Rui ZhangFeng He
May 16, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·H Almohammadi, A Amirfazli
Mar 2, 2019·Physical Review Letters·Jiguang HaoJ M Floryan
Jul 10, 2019·Physical Review Letters·Miguel A Quetzeri-SantiagoJ Rafael Castrejón-Pita
Apr 3, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Damon G K Aboud, Anne-Marie Kietzig
Jun 10, 2019·Journal of Colloid and Interface Science·H Almohammadi, A Amirfazli
Aug 12, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Chuanning ZhaoYoonjin Won
Jun 12, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Rui ZhangFeng He
Aug 5, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Zhizhao Che, Omar K Matar
Apr 11, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Alireza BordbarReza Kamali
Nov 5, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Sedigheh Khanzadeh BorjakMohammad Sadegh Valipour
Aug 20, 2021·Journal of Colloid and Interface Science·Y T AksoyM R Vetrano
Aug 1, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Damon G K Aboud, Anne-Marie Kietzig
Jun 30, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Damon G K Aboud, Anne-Marie Kietzig
Sep 2, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Lei YangPeng Zhang
Nov 16, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Tushar SrivastavaSasidhar Kondaraju

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