Obstructed breakup of slender drops in a microfluidic T junction.
Obstructed breakup of slender drops in a microfluidic T junction.
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DOI：
10.1103/physrevlett.108.264502
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发表时间：
2012-06
影响因子：
8.6
通讯作者：
A. Leshansky;S. Afkhami;Marie-Caroline Jullien;P. Tabeling
中科院分区：
文献类型：
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作者：
A. Leshansky;S. Afkhami;Marie-Caroline Jullien;P. Tabeling
在这封信中，我们提出了微流体 T 形连接中液滴破裂与“永久阻塞”的理论分析 [M.-C.朱利安等人，物理学。流体 21, 072001 (2009)]。所提出的理论基于界面形状的简单几何构造以及局部接触角的坦纳定律。由此产生的液滴变形随时间和毛细管数的缩放与直接数值模拟和先前实验的结果非常一致。基于润滑近似的更严格的分析揭示了类似于液滴在预先存在的液膜上扩散的经典问题的自相似行为。
In this Letter we present a theoretical analysis of the droplet breakup with "permanent obstruction" in a microfluidic T junction [M.-C. Jullien et al., Phys. Fluids 21, 072001 (2009)]. The proposed theory is based on a simple geometric construction for the interface shape combined with Tanner's law for the local contact angle. The resulting scaling of the droplet deformation with time and capillary number is in excellent agreement with the results of direct numerical simulations and prior experiments. More rigorous analysis based on the lubrication approximation reveals a self-similar behavior analogous to the classical problem of a droplet spreading over a preexisting liquid film.