Results 31 to 40 of about 7,956 (223)

An equivalent method of jet impact loading from collapsing near-wall acoustic bubbles: A preliminary study

Ultrasonics Sonochemistry, 2021
Cavitation damage is a micro, high-speed, multi-phase complex phenomenon caused by the near-wall bubble group collapse. The current numerical simulation method of cavitation mainly focuses on the collapse impact of a single cavitation bubble.
Xiang Lu, Chen Chen, Kai Dong, Zefa Li, Jiankang Chen   +4 more
doaj   +1 more source

Sterilization of Biofilm in Foam Using a Single Cavitation Bubble [PDF]

MATEC Web of Conferences, 2020
This article presents the sterilization of bacteria using cavitation bubbles. Cavitation generated by ultrasound creates a cavitation cloud. Therefore is more advantageous to generate the cavitation bubbles by laser-induced breakdown, because it is ...
Schovanec Petr, Jasikova Darina, Kotek Michal, Havlicek Karel, Nechanicka Magda, Eichler Jakub, Cech Jiri, Subrtova Petra   +7 more
doaj   +1 more source

Nonspherical laser-induced cavitation bubbles [PDF]

Physical Review E, 2010
The generation of arbitrarily shaped nonspherical laser-induced cavitation bubbles is demonstrated with a optical technique. The nonspherical bubbles are formed using laser intensity patterns shaped by a spatial light modulator using linear absorption inside a liquid gap with a thickness of 40 microm.
Lim, K.Y., Quinto-Su, P.A., Klaseboer, E., Khoo, B.C., Venugopalan, V., Ohl, C.-D.   +5 more
openaire   +4 more sources

The dynamics of cavitation bubbles in a sealed vessel

Ultrasonics Sonochemistry, 2022
A model of cavitation bubbles is derived in liquid confined in an elastic sealed vessel driven by ultrasound. In this model, an assumption that the pressure acting on the sealed vessel due to bubble pulsations is proportional to total volume change of bubbles is made. Numerical simulations are carried out for a single bubble and for bubbles.
Yang Shen, Weizhong Chen, Lingling Zhang, Yaorong Wu, Shaoyang Kou, Guoying Zhao   +5 more
openaire   +3 more sources

Tailored Nanogel Network Topology Enables Clinical Ultrasound‐Induced Mechanochemical Activation for In Vivo Therapy

Angewandte Chemie, EarlyView.
The strategy of engineering nanogel network topology is developed to achieve iterative activation of mechanophores upon high‐frequency and low‐intensity ultrasound. This places the nanogel system among the systems that can respond to the ultrasound with the highest frequency and lowest intensity as well as have the fastest activation rate so far.
Helin Li, Fangyin Song, Xiaoye Hu, Li Jing, Qi Shuai, Weike Su, Andrij Pich, Xin Li   +7 more
wiley   +2 more sources

Shockwaves from air bubbles within pits induced by nearby cavitation bubbles

Ultrasonics Sonochemistry
The cavitation intensity in near-boundary regions was significantly affected by the smoothness of boundaries. Micro pits on these boundaries may harbor smaller air bubbles or gas nuclei, and cavitation bubbles within cavitation clouds or cavitation ...
Jie Li, Siyu Chen, Jing Luo, Weilin Xu, Jiguo Tang, Tong Qu   +5 more
doaj   +1 more source

Impact-driven cavitation bubble dynamics

Experiments in Fluids, 2022
Abstract The dynamics of a single cavitation bubble exposed to a transient acceleration is studied experimentally. A single cavitation bubble is seeded with a pulsed laser in a free-falling and impacting water-filled test tube. After impact, a pressure wave containing compression and rarefaction phases is generated and interacts with ...
Hengzhu Bao, Fabian Reuter, Hongchao Zhang, Jian Lu, Claus-Dieter Ohl   +4 more
openaire   +1 more source

Analysis of suppressive effect of large bubbles on oscillation of cavitation bubble in cavitation field

Acta Physica Sinica, 2023
In this work, the interaction among multiple bubbles in a cavitation field is investigated by combining the experimental observation of small bubbles hovering around large bubbles. A model composed of three bubbles is developed, and the dynamic behavior of cavitation bubble is analyzed.
Chen-Yang Huang, Fan Li, Hua Tian, Jing Hu, Shi Chen, Cheng-Hui Wang, Jian-Zhong Guo, Run-Yang Mo   +7 more
openaire   +1 more source

On the Collapsing Behavior of Cavitation Bubble Clusters [PDF]

The Proceedings of the Fluids engineering conference, 2000
The present paper reports observation results of collapsing cavity bubbles on a two-dimensional foil section by a high-speed video camera, together with impulsive force measurement. Results of numerical simulations of the behavior of bubble cluster corresponding to the above condition are also shown.
KONNO, Akihisa, KATO, Hiroharu, YAMAGUCHI, Hajime, MAEDA, Masatsugu   +3 more
openaire   +2 more sources

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source