Numerical Simulation for Cavitation Cloud Formation by Focused Ultrasound Using the Ghost Fluid Method Coupled with Bubble Dynamics

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  • 気泡力学とGhost Fluid法に基づく集束超音波中でのキャビテーションクラウド形成シミュレーション

Abstract

<p>Numerical simulations have been conducted for the growth of bubble nuclei and the corresponding bubble cloud formation in a pressure field given by high intensity focused ultrasound backscattered from a laser-induced bubble interface. In the present simulations, the growth of nuclei in a microscopic field is calculated with the Keller equation for bubble dynamics. Once the nuclei grow so large that they can be captured with the level-set function, the macroscopic field is solved using the ghost fluid method with the level-set method. The bubble cloud formation observed in experiments has been successfully simulated using the present method.</p>

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