scholarly journals Numerical Simulation of Underwater Shock Wave Propagation in the Vicinity of Rigid Wall Based on Ghost Fluid Method

2015 ◽  
Vol 2015 ◽  
pp. 1-16 ◽  
Author(s):  
Ru-Chao Shi ◽  
Rui-Yuan Huang ◽  
Guang-Yong Wang ◽  
You-Kai Wang ◽  
Yong-Chi Li
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Wave Propagation ◽  
Grid Method ◽  
Rigid Wall ◽  
Shock Wave Propagation ◽  
Ghost Fluid Method ◽  
Underwater Shock Wave ◽  
Numerical Tests ◽  
Underwater Shock

This paper presents numerical simulation of underwater shock wave propagation nearby complex rigid wall. The Ghost Fluid Method (GFM) for the treatment of complex rigid wall is developed. The theoretical analysis on the GFM-based algorithm and relevant numerical tests demonstrate that the GFM-based algorithm is first-order accurate as applied to complex rigid wall. A large number of challenging numerical tests show that the GFM-based algorithm is robust and quite simple in various practical problems. The numerical results on shock wave propagation in the vicinity of rigid wall are verified by comparing to exact solution and the results by body-fitted-grid method.

Shock Wave Propagation Inside of Pressure Vessel Used for Food Processing

2012 ◽  
Author(s):  
Hirofumi Iyama ◽  
Yoshikazu Higa ◽  
Shigeru Itoh
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Wave Propagation ◽  
Pressure Vessel ◽  
Food Processing ◽  
High Explosive ◽  
Underwater Explosion ◽  
Underwater Shock Wave ◽  
Reflected Wave ◽  
Underwater Shock

In this study, it has aimed at the design of the pressure vessel for food processing using an underwater shock wave. This study aims at the design of a pressure vessel in which the underwater shock wave generated by the underwater explosion of high explosive was experimentally investigated by the optical observation and the pressure measurement. Therefore the pressure vessel is designed so that suitable pressure may apply on food. This designed vessel is evaluated by the numerical simulation. The interaction of the underwater shock wave, the incident wave and the reflected wave are investigated by the numerical simulation.

Computational Simulation of Underwater Shock Wave Propagation Using Smoothed Particle Hydrodynamics

2013 ◽  
Vol 767 ◽  
pp. 86-91 ◽  
Author(s):  
Shuhei Shinzato ◽  
Yoshikazu Higa ◽  
Tatsuhiro Tamaki ◽  
Hirofumi Iyama ◽  
Shigeru Itoh
Keyword(s):  
Shock Wave ◽  
Wave Propagation ◽  
Smoothed Particle Hydrodynamics ◽  
Food Processing ◽  
Computational Simulation ◽  
Shock Wave Propagation ◽  
Underwater Shock Wave ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Underwater Shock

Underwater shock wave phenomenon is applied to various fields such as manufacturing, food processing and medical equipment, and has been investigated with many experiment and numerical analysis. Because of low heat generation and possibility of downsizing of the device which generates shock wave, an application of shock wave induced by gap discharge in food processing has been studied recently. In this study, an ellipsoidal vessel filled with water is modeled in 2D and a computational simulation of underwater shock wave propagation is implemented using Smoothed Particle Hydrodynamics. Then, the computational result is compared with an experimental one and have a good agreement with the experimental one in qualitative. In the simulation, focusing of pressure wave, which is characteristic phenomenon of elliptical vessel, is observed.

Numerical Simulation on Explosive Welding Process Using Reflected Underwater Shock Wave

2007 ◽  
Vol 566 ◽  
pp. 309-314
Author(s):  
Kazumasa Shiramoto ◽  
Masahiro Fujita ◽  
Yasuhiro Ujimoto ◽  
Hirofumi Iyama ◽  
Shigeru Itoh
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Explosive Welding ◽  
Welding Process ◽  
Underwater Shock Wave ◽  
Underwater Shock ◽  
Effective Use

The paper describes a numerically simulated result for the explosive welding using reflected underwater shock wave. Through the numerical simulation, the effective use of reflected underwater shock wave was clearly suggested and the method to improve the assembly was demonstrated.

Numerical Simulation of Electrical Discharge Characteristics Induced by Underwater Wire Explosion

2018 ◽  
Vol 910 ◽  
pp. 72-77
Author(s):  
Ryo Henzan ◽  
Yoshikazu Higa ◽  
Osamu Higa ◽  
Ken Shimojima ◽  
Shigeru Itoh
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Electrical Discharge ◽  
Electrical Energy ◽  
Underwater Shock Wave ◽  
Discharge Characteristics ◽  
Wire Explosion ◽  
Electrical Wire ◽  
Electrical Wire Explosion ◽  
Underwater Shock

The underwater shock-wave phenomenon has been applied in various fields such as manufacturing and food processing and was investigated using many experimental and numerical analyses in the past. An underwater shock-wave is produced by various methods, e.g., underwater wire explosion and pulse-gap electrical discharge. Therefore, clarifying the shock characteristics depending on the stored electrical energy, wire dimension and material is extremely important. However, predicting the pressure and its distribution induced by underwater electrical wire explosion is hard because the phenomena associated with an elementary process are significantly complicated. In this study, to predict the discharge characteristics induced by underwater electrical wire explosion, numerical simulation based on the “simplified model of underwater electrical discharge” was performed. The numerical results show good agreement with the experimental ones.

Sign in / Sign up

Export Citation Format

Share Document