Contact Time of a Bouncing Nanodroplet,The Journal of Physical Chemistry Letters

当前位置： X-MOL 学术 › J. Phys. Chem. Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Contact Time of a Bouncing Nanodroplet
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2020-03-20 , DOI: 10.1021/acs.jpclett.0c00788
Fang-Fang Xie _{1,

2} , Shu-Hang Lv _{1,

2} , Yan-Ru Yang _{1,

2} , Xiao-Dong Wang _{1,

2}

Affiliation

We study the bouncing dynamics of nanodroplets on superhydrophobic surfaces. We show that there are three velocity regimes with different scaling laws of the contact time, τ. Although τ remains constant over a wide velocity range, as seen for macroscale bouncing, we demonstrate that viscosity plays an essential role in nanodroplet bouncing even for low-viscosity fluids. We propose a new scaling τ ∼ (ρμR₀⁴/γ²)^1/3 = (R₀/v₀)We^2/3Re^–1/3 to characterize the viscosity effect, which agrees well with the simulated results for water and argon nanodroplets with various radii and hydrophobicities. We also find pancake bouncing of nanodroplets, which is responsible for an abruptly reduced τ in a high-velocity regime.

中文翻译：

弹跳纳米液滴的接触时间

我们研究超疏水表面上的纳米液滴的弹跳动力学。我们表明，存在三种具有不同接触时间比例律的速度规律。尽管τ在较大的速度范围内保持恒定，如宏观弹跳所见，但我们证明，即使对于低粘度流体，粘度在纳米液滴弹跳中也起着至关重要的作用。我们提出了一个新的缩放τ〜（ρμR ₀⁴ /γ ²）^1/3 =（[R ₀ / v ₀）我们^2/3重新^-1/3表征粘度效应，与具有不同半径和疏水性的水和氩纳米滴的模拟结果非常吻合。我们还发现纳米液滴的薄煎饼弹起，这是在高速状态下τ突然减小的原因。

更新日期：2020-04-24

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11