Extraordinary stability of surfactant-free bubbles suspended in ultrasound  

作　　者：Xiaoliang Ji Wenxuan Zhong Kangqi Liu Yichen Jiang Hongyue Chen Wei Zhao Duyang Zang 

机构地区：[1]School of Physical Science and Technology,Northwestern Polytechnical University,Xi'an,China [2]Shaanxi Liquid Physics Research Center,Xi'an,China [3]School of Marine Science and Technology,Northwestern Polytechnical University,Xi'an,China [4]State Key Laboratory of Photon-Technology in Western China Energy,International Scientific and Technological Cooperation Base of Photoelectric Technology and Functional Materials and Application,Institute of Photonics and Photon-Technology,Northwest University,Xi'an,China

出　　处：《Droplet》2024年第2期146-152,共7页液滴（英文）

基　　金：the National Natural Science Foundation of China(Grant Nos.12272314,11972303);the Opening Fund of the State Key Laboratory of Nonlinear Mechanics for supporting this research financially.

摘　　要：Gravity-induced drainage is one of the main destabilizing mechanisms for soap bubbles and foams.Here we show that solely through acoustic levitation without introducing any chemical stabilizers,liquid drainage in the bubble film can be completely inhibited,therefore leading to a significant enhancement of bubble lifetime by more than two orders of magnitude and enabling the bubble to survive puncturing by a needle.Based on sound simulation and force analysis,it has been found that acoustic radiation force,exerted on both the inner and outer surfaces of the levitated bubble,acts in opposite directions,thus providing a squeezing effect to the bubble film.The hydrostatic pressure that induces drainage has been balanced by the acoustic radiation pressure exerted on both sides of the film,which is at the origin of the sound stabilization mechanism.This study provides new insights into the interplay between sound and soap bubbles or films,thus stimulating a wide range of fundamental research concerning bubble films and expanding their applications in bio/chemical reactors.

关 键 词：BUBBLE SOUND ordinary 

分 类 号：O35[理学—流体力学]