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http://dx.doi.org/10.3795/KSME-B.2013.37.5.489

Shape Oscillation and Mode Characteristic of Droplet on Vibrating Flat Surface  

Shin, Young-Sub (School of Mechanical Engineering, Pusan Nat'l Univ.)
Lim, Hee-Chang (School of Mechanical Engineering, Pusan Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.37, no.5, 2013 , pp. 489-494 More about this Journal
Abstract
This study aims to understand the mode characteristics of a droplet under a periodic forced vibration. To predict the resonance frequency of a droplet, theoretical and experimental approaches were employed. A high-speed camera was used to capture the various deformation characteristics of a droplet-mode shape, detachment, separated secondary droplet, and skewed deformation. The comparison between the theoretical and the experimental approaches shows a ~10% discrepancy in the prediction of the resonance frequency, which appears to be caused by the effect of contact line friction, nonlinear wall adhesion, and experimental uncertainty. Owing to contact-line pinning and smaller amplitude, the droplet shape becomes symmetric and the size of each lobe at the resonance frequency exceeds that at the neighbor, which is out of resonance.
Keywords
Droplet; Lobe; Resonance Frequency; Secondary Droplet; Shape Oscillation;
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