Review of Underwater Shock Waves and Their Interactions with Bubbles

Author(s):  
Kazuyoshi Takayama ◽  
Sutthisak Phongthaanapanich
Keyword(s):  
2000 ◽  
Author(s):  
S. H. R. Hosseini ◽  
T. Hirano ◽  
O. Onodera ◽  
K. Takayama

Abstract For applying shock waves to precise medical procedures like neurosurgery, a reliable generation of micro shock waves is required. Such sensitive applications make limits on usage of conventional underwater shock wave sources like Extracoporeal Shock Waves ESW [1] or micro explosives [2]. In the present study a Q-switched Ho:YAG laser and an optical fiber are used. Advantages of this method over previous shock wave sources are two order of magnitude reduction in focusing area if compared with ESW and elimination of product gases of micro explosives. Nakahara and Nagayama [3] studied underwater shock waves emanated from surface of an optical fiber by pulse Nd:YAG laser input using shadowgraph technique. Their qualitative study limited to visualization of shock waves at its early stage. The present research aims to clarify quantitatively process of the shock wave generation by direct laser beam irradiation through optical fibers, growth and behavior of generated cavities, and structure of heat induced flow in front of the optical fiber.


Author(s):  
T. N. Fedoseeva ◽  
F. E. Fridman ◽  
V. N. Goldberg ◽  
I. G. Zarnitsina

Author(s):  
Huantong Shi ◽  
Guofeng Yin ◽  
Xingwen Li ◽  
Jian Wu ◽  
Anthony B Murphy ◽  
...  

Author(s):  
Frederick L. YARGER ◽  
Fernando E. PRIETO ◽  
Achim M. LOSKE

Author(s):  
Zhanke Liu ◽  
Yin L. Young

This paper presents the transient response of submerged elastic structures subject to underwater shock waves. Two fundamental effects are investigated, namely, the inertial and elastic effects, characterized by two non-dimensional parameters, namely, the inertial parameter M and the elastic parameter K. Case studies are provided with physical and mathematical interpretations of the results.


1998 ◽  
Vol 120 (1) ◽  
pp. 51-55 ◽  
Author(s):  
S. Itoh ◽  
S. Kubota ◽  
S. Nagano ◽  
M. Fujita

The characteristics of a new assembly for the shock consolidation of difficult-to-consolidate powders, such as inter-metallic compounds or ceramic materials, were investigated by both the experimental method and numerical simulation method. The assembly consists of an explosive container, a water chamber, and a powder container. Once the explosive is detonated, a detonation wave occurs and propagates, and then impinges on the water surface of the water chamber. After that, there occurs immediately an underwater shock wave in the water chamber. The underwater shock wave interacts with the wall of the chamber during its propagation so that its strength is increased by the converging effect. We used the usual shadow graph system to photograph the interaction process between detonation wave and water. We also used a Manganin piezoresistance gage to measure the converged pressure of the conical water chamber. Finally, we numerically investigated, in detail, the converging effects of the various conical water chambers on the underwater shock waves. The experimental results and the correspondingly numerical results agree quite well with each other.


2009 ◽  
Vol 2009.19 (0) ◽  
pp. 312-315
Author(s):  
Minoru SUZUKI ◽  
Yasuo ISHIKAWA ◽  
Hiroyasu TSUZUKI ◽  
Sayaka YAMAGUCHI ◽  
Tsutomu CHIJIIWA

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