Numerical simulation of the coalescence of two bubbles in an ultrasound field

作者：Xu, Zheng^*

来源：Ultrasonics Sonochemistry, 2018, 49: 277-282.

DOI：10.1016/j.ultsonch.2018.08.014

• Ultrasound irradiation
• Bubbles coalescence
• Bjerknes force
• Drainage time

The coalescence of two bubbles under ultrasound irradiation is numerically investigated. The results indicate that ultrasound may accelerate the coalescence process, depending on the initial phase. The time-averaged nonzero Bjerknes force promotes bubble coalescence by dragging bubbles to nodes or antinodes, depending on their size. At the beginning of the coalescence process, a film forms between the two bubbles. The film drainage time first increases then decreases as a function of initial distance. This study contributes to an understanding of the effects of ultrasound on bubble coalescence.

• 出版日期2018-12
• 单位同济大学