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Journal of Nanotechnology
Volume 2018, Article ID 3701047, 6 pages
https://doi.org/10.1155/2018/3701047
Research Article

Shape Oscillation of a Single Microbubble in an Ultrasound Field

Institute of Fluid Measurement and Simulation, China Jiliang University, Hangzhou 310018, China

Correspondence should be addressed to Fubing Bao; nc.ude.uljc@3705020a80

Received 2 February 2018; Accepted 25 July 2018; Published 15 August 2018

Academic Editor: Xiaoke Ku

Copyright © 2018 Xian Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The shape oscillation of a single two-dimensional nitrogen microbubble in an ultrasound field is numerically investigated. The Navier–Stokes equations are solved by using the finite-volume method combined with the volume-of-fluid model. The numerical results are in good accordance with experimental and theoretical results reported. According to the analyses of the shape oscillation process, the bubble deformation period is twice the driving acoustic pressure period and the shape oscillation is mainly caused by the change of interface velocity. The vortexes produced due to velocity variations lead to the deformation of the bubble interface.