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arXiv physics/0509133physics.flu-dyn
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水滴撞击非润湿表面的回缩动力学

Retraction dynamics of aquous drops upon impact on nonwetting surfaces

Denis Bartolo, Christophe Josserand, Daniel Bonn

摘要:

我们研究了高速撞击疏水表面后液滴的撞击和随后的回缩动力学。进行广泛的实验,我们表明,液滴回缩率是一个材料常数,并不依赖于冲击速度。我们表明,当增加Ohnesorge数$\Oh=η/\sqrt{ρR_{\rm I} γ}$时,回缩(即去湿)动力学从毛细惯性状态转变为毛细粘性状态。我们合理化的实验观察一个简单的,但强大的半定量模型的固-液接触线动力学的启发标准理论的薄膜去湿。

英文摘要:

We study the impact and subsequent retraction dynamics of liquid droplets upon high-speed impact on hydrophobic surfaces. Performing extensive experiments, we show that the drop retraction rate is a material constant and does not depend on the impact velocity. We show that when increasing the Ohnesorge number, $\Oh=η/\sqrt{ρR_{\rm I} γ}$, the retraction, i.e. dewetting, dynamics crosses over from a capillaro-inertial regime to a capillaro-viscous regime. We rationalize the experimental observations by a simple but robust semi-quantitative model for the solid-liquid contact line dynamics inspired by the standard theories for thin film dewetting.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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