CONTROLLED ADSORPTION OF DROPLETS ONTO ANTI-NODES OF AN ULTRASONICALLY VIBRATING NEEDLE

摘要：

We show that droplets adsorb onto the anti-nodes of a stainless needle in flexural vibration when the needle is lifted from a layer of liquid thin film. The adsorbed liquid includes water, saline and olive oil, which cannot adsorb onto a stainless surface if the surface does not vibrate. The adsorbed droplets take on the shape of ellipsoid when the needle vibration is large enough. A physical model based on the hypothesis that sound pressure decreases the cohesive force among molecules of liquid has been proposed, which can well explain the experimental phenomena.

关键词： Droplet adsorption Vibrating needle Ultrasound Cohesive force among molecules

作者: Ning Li Jun-hui Hu Jin-juan Zhou

作者单位: State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

会议类型: 国际会议

会议名称: The 2011 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2011年全国压电和声波理论及器件技术研讨会)

会议地点: 深圳

会议语种:英文

页码: 13-16

在线出版日期: 2011-12-09（万方平台首次上网日期，不代表论文的发表时间）