Spreading and atomization of droplets on a vibrating surface in a standing pressure field
Spreading and atomization of droplets on a vibrating surface in a standing pressure field
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DOI：
10.1063/1.4757567
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发表时间：
2012-10-01
影响因子：
4
通讯作者：
Kumar, Ranganathan
中科院分区：
文献类型：
--
作者：
Deepu, P.;Basu, Saptarshi;Kumar, Ranganathan
本文报道了在超声静压力场作用下，液滴在振动表面上的变形和扩散的第一个观测和分析模型。驻波允许液滴扩散，扩散速率与粘度成反比。在低粘度液滴中，径向声力和换能器表面加速度的协同作用也导致毛细波的产生。这些不稳定的毛细模式生长导致最终分解成子液滴。我们发现使用纳米悬浮液，可以通过抑制毛细模式的发展和随后的破裂来防止扩散和解体。(C) 2012年美国物理研究所。[http://dx.doi.org/10.1063/1.4757567]
We report the first observation and analytical model of deformation and spreading of droplets on a vibrating surface under the influence of an ultrasonic standing pressure field. The standing wave allows the droplet to spread, and the spreading rate varies inversely with viscosity. In low viscosity droplets, the synergistic effect of radial acoustic force and the transducer surface acceleration also leads to capillary waves. These unstable capillary modes grow to cause ultimate disintegration into daughter droplets. We find that using nanosuspensions, spreading and disintegration can be prevented by suppressing the development of capillary modes and subsequent break-up. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4757567]