Free films of a partially wetting liquid under the influence of a propagating MHz surface acoustic wave

• DOI: 10.1063/1.4955414
• Publication Date: 2016-07-13T20:12:37Z
• Authors: Gennady Altshuler; Ofer Manor
• Keywords: Dewetting; Capillary wave; Lubrication theory; Free surface; Wetting transition

We use both theory and experiment to study the response of thin free films a partially wetting liquid MHz vibration, propagating in solid substrate form Rayleigh surface acoustic wave (SAW). generalise previous for fully film SAW by including presence small but finite three phase contact angle between solid. The invokes convective drift mass leaks sound waves. dynamics that is too support accumulation leakage governed balance capillary stress alone. demonstrate film, supporting weak stress, will spread along path SAW. A an appreciable however undergo concurrent dynamic dewetting at front rear, respectively, such displace, rather than spread, result agreement with experimental theoretical studies on silicon oil No corresponding results exist case stress. thus complement large limit our undertaking procedure where we explore water surfactant solutions SAW, which found be qualitative this limit.