Results 31 to 40 of about 155,194 (319)

Non-spherical collapse of an air bubble subjected to a lithotripter pulse [PDF]

, 2008
In order to better understand the contribution of bubble collapse to stone comminution in shockwave lithotripsy, the shockinduced and Rayleigh collapse of a spherical air bubble is investigated using numerical simulations, and the free-field collapse ...
Bailey, Michael R., Colonius, Tim, Johnsen, Eric, Kreider, Wayne   +3 more
core   +1 more source

Numerical simulation of the backscattering of pressure waves from a bubble interface

Nihon Kikai Gakkai ronbunshu, 2015
The direct numerical simulations are conducted for the backscattering of incident pressure waves from a bubble with the ghost fluid method in order to understand the formation of secondary cavitation in the high intensity focused ultrasound (HIFU). It is
Moeko TANAKA, Toshiyuki OGASAWARA, Hiroyuki TAKAHIRA   +2 more
doaj   +1 more source

Acoustophoretic trapping of particles by bubbles in microfluidics

Frontiers in Physics, 2023
We present in this paper a simple method to produce strategic acoustic particle capture sites in microfluidic channels in a controlled way. Air bubbles are intermittently injected into a micro-capillary with rectangular cross section during a flow motion
Itziar González, Manuel Candil, Jon Luzuriaga, Jon Luzuriaga   +3 more
doaj   +1 more source

Study on the Motion Characteristics of Solid Particles in Fine Flow Channels by Ultrasonic Cavitation

Micromachines, 2022
Microjets caused by the cavitation effect in microchannels can affect the motion trajectory of solid particles in microchannels under ultrasonic conditions.
Mu Yuan, Chen Li, Jiangqin Ge, Qingduo Xu, Zhian Li   +4 more
doaj   +1 more source

Effects of thermal conduction in sonoluminescence [PDF]

, 1997
We show by numerical hydrodynamic calculations that there are two important effects of thermal conduction in sonoluminescence: (i) the bubble remains close to being isothermal during the expansion phase; and (ii) a cold, dense layer of air is formed at ...
Chu, M.-C., Leng, D.
core   +2 more sources

Eulerian-Lagrangian method for simulation of cloud cavitation [PDF]

, 2017
We present a coupled Eulerian-Lagrangian method to simulate cloud cavitation in a compressible liquid. The method is designed to capture the strong, volumetric oscillations of each bubble and the bubble-scattered acoustics.
Colonius, Tim, Maeda, Kazuki
core   +3 more sources

Lateral Degassing Method for Disposable Film-Chip Microfluidic Devices

Membranes, 2021
It is critical to develop a fast and simple method to remove air bubbles inside microchannels for automated, reliable, and reproducible microfluidic devices.
Suhee Park, Hyungseok Cho, Junhyeong Kim, Ki-Ho Han   +3 more
doaj   +1 more source

Shock-induced collapse of a gas bubble in shockwave lithotripsy [PDF]

, 2008
The shock-induced collapse of a pre-existing nucleus near a solid surface in the focal region of a lithotripter is investigated. The entire flow field of the collapse of a single gas bubble subjected to a lithotripter pulse is simulated using a high ...
Colonius, Tim, Johnsen, Eric
core   +2 more sources

Numerical study of laser-induced cavitation bubble with consideration of chemical reactions

Ultrasonics Sonochemistry
Cavitation generated during injector jetting can significantly affect fuel atomization. Laser-induced cavitation bubble is an important phenomenon in laser induced plasma ignition technology.
Chengyan Wang, Hong Yan, Ruifan Zhang, Fuzhen Chen, Fan Liu   +4 more
doaj   +1 more source

Numerical Prediction of Cavitation Erosion Intensity in Cavitating Flows around a Clark Y 11.7% Hydrofoil

Journal of Fluid Science and Technology, 2010
A numerical prediction method of cavitation erosion is proposed. In this method, the analysis of bubbles in cavitating flows is performed and the intensity of cavitation erosion is evaluated by the impact pressure induced by spherical bubble collapse. In
Naoya OCHIAI, Yuka IGA, Motohiko NOHMI, Toshiaki IKOHAGI   +3 more
doaj   +1 more source