Impact Dynamics of Non-Newtonian Droplets on Superhydrophobic Surfaces.
Impact Dynamics of Non-Newtonian Droplets on Superhydrophobic Surfaces.
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DOI：
10.1021/acs.langmuir.3c00043
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发表时间：
2023-04-25
期刊：
影响因子：
3.9
通讯作者：
Fu, Yong-Qing
中科院分区：
文献类型：
--
作者：
Biroun, Mehdi H.;Haworth, Luke;Abdolnezhad, Hossein;Khosravi, Arash;Agrawal, Prashant;McHale, Glen;Torun, Hamdi;Semprebon, Ciro;Jabbari, Masoud;Fu, Yong-Qing
液滴在固体表面上的冲击行为对于许多工业应用至关重要，例如喷涂，食品生产，印刷和农业。对于所有这些应用，一个共同的挑战是修改和控制液滴的冲击状态和接触时间。对于具有复杂流变性质的非牛顿液体，这一挑战变得更加关键。在这项研究中，我们探索了非牛顿液体（通过向水中加入不同浓度的黄原胶）对超疏水表面的影响动力学。我们的实验结果表明，通过增加水中黄原胶的浓度，弹跳液滴的形状发生了巨大的变化，例如，在分离时刻，它的形状从传统的垂直喷射变成了“蘑菇”状。因此，非牛顿液滴的接触时间可以减少高达50%。我们比较了黄原胶液体与具有相似表观粘度的甘油溶液的冲击情况，结果表明，延伸粘度的差异导致液滴的冲击动力学不同。最后，我们表明，通过增加所有液体的韦伯数，接触时间缩短，最大扩散半径增加。
Droplet impact behavior on a solid surface is critical for many industrial applications such as spray coating, food production, printing, and agriculture. For all of these applications, a common challenge is to modify and control the impact regime and contact time of the droplets. This challenge becomes more critical for non-Newtonian liquids with complex rheology. In this research, we explored the impact dynamics of non-Newtonian liquids (by adding different concentrations of Xanthan into water) on superhydrophobic surfaces. Our experimental results show that by increasing the Xanthan concentration in water, the shapes of the bouncing droplet are dramatically altered, e.g., its shape at the separation moment is changed from a conventional vertical jetting into a “mushroom”-like one. As a result, the contact time of the non-Newtonian droplet could be reduced by up to ∼50%. We compare the impact scenarios of Xanthan liquids with those of glycerol solutions having a similar apparent viscosity, and results show that the differences in the elongation viscosity induce different impact dynamics of the droplets. Finally, we show that by increasing the Weber number for all of the liquids, the contact time is reduced, and the maximum spreading radius is increased.
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影响因子：
16.6
作者：
Liu Y;Andrew M;Li J;Yeomans JM;Wang Z
通讯作者：
Wang Z
DOI：
10.1063/10.0017254
发表时间：
2023-03-01
期刊：
NANOTECHNOLOGY AND PRECISION ENGINEERING
影响因子：
--
作者：
Haworth, Luke;Yang, Deyu;Fu, Yongqing
通讯作者：
Fu, Yongqing
影响因子：
1.2
作者：
Moon, Joo Hyun;Lee, Jae Bong;Lee, Seong Hyuk
通讯作者：
Lee, Seong Hyuk
影响因子：
41.2
作者：
Blossey, R
通讯作者：
Blossey, R
影响因子：
16.6
作者：
Gauthier A;Symon S;Clanet C;Quéré D
通讯作者：
Quéré D