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Controlled adsorption of droplets onto anti-nodes of an ultrasonically vibrating needle
By: Jun-hui Hu; Ning Li; Jin-juan Zhou;
2011 / IEEE / 978-1-4673-1078-9
This item was taken from the IEEE Conference ' Controlled adsorption of droplets onto anti-nodes of an ultrasonically vibrating needle ' 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.
Ultrasonically Vibrating Needle
Liquid Thin Film
Controlled Droplet Adsorption
Cohesive Force Among Molecules