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Published October 2011 | Published
Journal Article Open

Bubble dynamics atop an oscillating substrate: Interplay of compressibility and contact angle hysteresis

Abstract

We consider a sessile hemispherical bubble sitting on the transversally oscillating bottom of a deep liquid layer and focus on the interplay of the compressibility of the bubble and the contact angle hysteresis. In the presence of contact angle hysteresis, the compressible bubble exhibits two kinds of terminal oscillations: either with the stick-slip motion of the contact line or with the completely immobile contact line. For the stick-slip oscillations, we detect a double resonance, when the external frequency is close to eigenfrequencies of both the breathing mode and shape oscillations. For the regimes evolving to terminal oscillations with the fixed contact line, we find an unusual transient resembling modulated oscillations.

Additional Information

© 2011 American Institute of Physics. Received 13 July 2011; accepted 21 September 2011; published online 19 October 2011. The authors gratefully acknowledge support by German Science Foundation (DFG Project No. 436 RUS113/977/0- 1) and Russian Foundation for Basic Research (Project No. 08-01-91959). A.S. additionally acknowledges support by DFG SPP 1164 "Nano- and microfluidics" (DFG Project No. STR 1021/1-2).

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