15 March 2018 Investigation of bubble dynamics in nonlinear acoustic field
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Abstract
Many bio-medical applications entail the problems of spatially manipulating microbubbles by means of high-intensity focused ultrasound (HIFU) pressure field. This paper investigates the nonlinear coupling between radial pulsations, axisymmetric modes of shape oscillations and translational motion of a single spherical gas bubble in water domain when it is subjected to a focused nonlinear acoustic pressure. A multiphysics mathematical model is investigated to obtain nonlinear acoustic field from a focused transducer and to account for bubble oscillations in the resultant HIFU pressure field. The effects of acoustic nonlinearity on the bubble dynamics are examined to determine the instability of the mode shapes of a bubble, which is contributing to form the translational instability, known as dancing motion. Furthermore, acoustic streaming effects caused by radial pulsations of a microbubble in the surrounding water domain are reported.
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Marjan Bakhtiari-Nejad, Marjan Bakhtiari-Nejad, Shima Shahab, Shima Shahab, } "Investigation of bubble dynamics in nonlinear acoustic field", Proc. SPIE 10595, Active and Passive Smart Structures and Integrated Systems XII, 105951D (15 March 2018); doi: 10.1117/12.2296736; https://doi.org/10.1117/12.2296736
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