Deformation pathways and breakup modes in acoustically levitated bicomponent droplets under external heating
Deformation pathways and breakup modes in acoustically levitated bicomponent droplets under external heating
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DOI：
10.1103/physreve.93.033103
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发表时间：
2016-03-07
影响因子：
2.4
通讯作者：
Basu, Saptarshi
中科院分区：
文献类型：
--
作者：
Pathak, Binita;Basu, Saptarshi
利用热或声学控制液滴的破裂在制药、纳米颗粒生产和燃烧等应用中至关重要。在目前的工作中，我们已经确定了在外部加热的声悬浮双组分（苯-十二烷）液滴中不同的热声诱导变形机制（韧带和气泡）和破裂动力学，这两种组分的挥发性变化很大（苯比十二烷挥发性大得多）。我们展示了导致韧带产生和生长的液滴表面塌陷的物理机制和普遍行为。顶表面的塌落是由声压场和液滴的限制表面张力之间的平衡控制的。不同苯浓度（体积比为70%）崩落剖面的普遍塌陷。研究结果可移植到任何类似的双组分系统的差异挥发性。
Controlled breakup of droplets using heat or acoustics is pivotal in applications such as pharmaceutics, nanoparticle production, and combustion. In the current work we have identified distinct thermal acoustics-induced deformation regimes (ligaments and bubbles) and breakup dynamics in externally heated acoustically levitated bicomponent (benzene-dodecane) droplets with a wide variation in volatility of the two components (benzene is significantly more volatile than dodecane). We showcase the physical mechanism and universal behavior of droplet surface caving in leading to the inception and growth of ligaments. The caving of the top surface is governed by a balance between the acoustic pressure field and the restrictive surface tension of the droplet. The universal collapse of caving profiles for different benzene concentration (70% by volume). The findings are portable to any similar bicomponent systems with differential volatility.