Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 22: POSTERS Micro- and Nanofluidics
CPP 22.2: Poster
Mittwoch, 27. Februar 2008, 16:00–18:30, Poster A
Vibration dynamics of a bubble in contact with solid surface — Sergey V. Shklyaev1 and •Arthur V. Straube2 — 1Theoretical Physics Department, Perm State University, Bukirev 15, 614990 Perm, Russia — 2Department of Physics, University of Potsdam, Am Neuen Palais 10, PF 601553, D-14415 Potsdam, Germany
The linear natural and forced oscillations of a bubble in a liquid ambient in contact with a solid surface are studied [1]. We consider a class of boundary conditions allowing for different behavior at the contact line, where the three phases touch. The contact line dynamics is taken into consideration with the Hocking condition, which is shown to lead to interaction of the shape and volume oscillations even within the linear theory. Resonant phenomena, mostly pronounced for the bubble with the fixed contact line or with the fixed contact angle, are found out. The limiting case of weakly compressible bubble is analyzed. The general criterion identifying whether the compressibility of a bubble can be neglected is obtained.
[1] S.V. Shklyaev, A.V. Straube, Linear oscillations of a hemispherical bubble on a solid substrate, submitted to Phys. Fluids (arXiv:0710.0212)