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The Modified Ghost Method for Compressible Multi-Medium Interaction with Elastic-Plastic Solid

Part of: Numerical methods Two-phase and multiphase flows Coupling of solid mechanics with other effects Equations of mathematical physics and other areas of application

Published online by Cambridge University Press:  31 October 2017

Zhiwei Feng ,
Jili Rong ,
Abouzar Kaboudian  and
Boo Cheong Khoo
Zhiwei Feng*
Affiliation:
School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
Jili Rong*
Affiliation:
School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
Abouzar Kaboudian*
Affiliation:
School of Physics, Georigia Institute of Technology, Atlanta GA 30332-0400, USA
Boo Cheong Khoo*
Affiliation:
Department of Mechanical Engineering, National University of Singapore, 5A Engineering Drive 1, 02-02, Singapore
*
*Corresponding author. Email addresses:[email protected](Z.W. Feng), [email protected](J. L. Rong), [email protected](A. Kaboudian) [email protected](B. C. Khoo)
*Corresponding author. Email addresses:[email protected](Z.W. Feng), [email protected](J. L. Rong), [email protected](A. Kaboudian) [email protected](B. C. Khoo)
*Corresponding author. Email addresses:[email protected](Z.W. Feng), [email protected](J. L. Rong), [email protected](A. Kaboudian) [email protected](B. C. Khoo)
*Corresponding author. Email addresses:[email protected](Z.W. Feng), [email protected](J. L. Rong), [email protected](A. Kaboudian) [email protected](B. C. Khoo)
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Abstract

In this work, a robust, consistent, and coherent approach, termed as Modified Ghost Method (MGM), is developed to deal with the multi-medium interaction with elastic-plastic solid. This approach is simple to implement and keeps the solvers intact, and can handle multi-medium problems which involve various media including gas, liquid and solid. The MGM is first validated by two-dimensional (2D) cases and then is applied to study the interaction between elastic-plastic solid structure and the underwater explosion. The development of the wave system is described and analyzed. Furthermore, two kinds of complex solid structure subjected to underwater explosion are simulated. Finally, a complex solid structure immersed in water subjected to underwater explosion is simulated and analyzed. The numerical experiments show the viability, effectiveness and versatility of the proposed method which is able to accurately predict the wave pattern at various interfaces.

Keywords

Multi-medium interactionmodified ghost methodelastic-plastic solidcomplex solid structure

MSC classification

Secondary: 35Q31: Euler equations 74F10: Fluid-solid interactions (including aero- and hydro-elasticity, porosity, etc.) 74S20: Finite difference methods 76T99: None of the above, but in this section
Type
Research Article
Information
Communications in Computational Physics , Volume 22 , Issue 5 , November 2017 , pp. 1258 - 1285
Copyright
Copyright © Global-Science Press 2017 

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