Original title: Dynamics of Shape Oscillations of a Bubble Attached to a Capillary Tip
Authors: Vobecká, Lucie ; Vejražka, Jiří ; Orvalho, Sandra ; Zedníková, Mária ; Tihon, Jaroslav
Document type: Papers
Conference/Event: Experimental Fluid Mechanics 2010, Liberec (CZ), 2010-11-24 / 2010-11-26
Year: 2010
Language: eng
Abstract: The shape oscillations of a bubble, which is attached to a tip of a capillary tube, are studied experimentally. It is observed that the attachment leads to an appearance of an additional low-frequency mode (denoted as mode 1), when compared to standard theories of oscillations of free bubbles or drops. It is observed that the frequency of mode 1 scales with the bubble size as f ~ D^(-2). The oscillation dynamics of a bubble is strongly influenced if some surface active agent is present in the liquid. Due to interfacial elasticity, the surfactants presence in low concentration increases the oscillation frequency. The decay of oscillations is also faster, probably due to an increase of energy dissipation by Marangoni stresses.
Keywords: bubbles; capillary tip; dynamics of shape oscillations
Project no.: CEZ:AV0Z40720504 (CEP), GA104/07/1110 (CEP), IAA200720801 (CEP), KJB200720801 (CEP)
Funding provider: GA ČR, GA AV ČR, GA AV ČR
Host item entry: Proceedings Book, ISBN 978-80-7372-670-6

Institution: Institute of Chemical Process Fundamentals AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0193989

Permalink: http://www.nusl.cz/ntk/nusl-42437


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