Explosion Simulation Including a Coupled Fluid-Structure Interaction Problem Using Smoothed Particle Hydrodynamics

2006 ◽  
Author(s):  
Wataru Kobashi ◽  
Akiko Matsuo ◽  
Kenji Murata ◽  
Hirohisa Noguchi ◽  
Yukio Kato
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Interaction Problem

scholarly journals Dealing with the Effect of Air in Fluid Structure Interaction by Coupled SPH-FEM Methods

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1162 ◽  
Author(s):  
Cristiano Fragassa ◽  
Marko Topalovic ◽  
Ana Pavlovic ◽  
Snezana Vulovic
Keyword(s):  
Finite Element Method ◽  
Smoothed Particle Hydrodynamics ◽  
Computational Models ◽  
Fluid Structure Interaction ◽  
The Finite Element Method ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
High Computational Complexity

Smoothed particle hydrodynamics (SPH) and the finite element method (FEM) are often combined with the scope to model the interaction between structures and the surrounding fluids (FSI). There is the case, for instance, of aircrafts crashing on water or speedboats slamming into waves. Due to the high computational complexity, the influence of air is often neglected, limiting the analysis to the interaction between structure and water. On the contrary, this work aims to specifically investigate the effect of air when merged inside the fluid–structure interaction (FSI) computational models. Measures from experiments were used as a basis to validate estimations comparing results from models that include or exclude the presence of air. Outcomes generally showed a great correlation between simulation and experiments, with marginal differences in terms of accelerations, especially during the first phase of impact and considering the presence of air in the model.

scholarly journals Fully Coupled Smoothed Particle Hydrodynamics-Finite Element Method Approach for Fluid–Structure Interaction Problems With Large Deflections

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
A. Ersin Dinçer ◽  
Abdullah Demir ◽  
Zafer Bozkuş ◽  
Arris S. Tijsseling
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Method ◽  
Smoothed Particle Hydrodynamics ◽  
Fluid Structure Interaction ◽  
Elastic Structure ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

Abstract In this study, a combination of the smoothed particle hydrodynamics (SPH) and finite element method (FEM) solving the complex problem of interaction between fluid with free surface and an elastic structure is studied. A brief description of SPH and FEM is presented. Contact mechanics is used for the coupling between fluid and structure, which are simulated with SPH and FEM, respectively. In the proposed method, to couple mesh-free and mesh-based methods, fluid and structure are solved together by a complete stiffness matrix instead of iterative predictive–corrective or master–slave methods. In addition, fully dynamic large-deformation analysis is carried out in FEM by taking into account mass and damping of the elastic structure. Accordingly, a two-dimensional fluid–structure interaction (FSI) code is developed and validated with two different experiments available in the literature. The results of the numerical method are in good agreement with the experiments. In addition, a novel laboratory experiment on a dam break problem with elastic gate in which the length of the initial water column is larger than its height is conducted. The main difference between the previous experiments and the one conducted in this study is that an upward water motion parallel to the elastic gate is observed at the upstream side of the gate. This motion is captured with the numerical method.

scholarly journals Fluid–Structure Interaction Analyses of Biological Systems Using Smoothed-Particle Hydrodynamics

Biology ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 185
Author(s):  
Milan Toma ◽  
Rosalyn Chan-Akeley ◽  
Jonathan Arias ◽  
Gregory D. Kurgansky ◽  
Wenbin Mao
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Computational Models ◽  
Biological Systems ◽  
Fluid Structure Interaction ◽  
Disease Diagnosis ◽  
Fluid Structure ◽  
Interaction Models ◽  
Structure Interaction ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

Due to the inherent complexity of biological applications that more often than not include fluids and structures interacting together, the development of computational fluid–structure interaction models is necessary to achieve a quantitative understanding of their structure and function in both health and disease. The functions of biological structures usually include their interactions with the surrounding fluids. Hence, we contend that the use of fluid–structure interaction models in computational studies of biological systems is practical, if not necessary. The ultimate goal is to develop computational models to predict human biological processes. These models are meant to guide us through the multitude of possible diseases affecting our organs and lead to more effective methods for disease diagnosis, risk stratification, and therapy. This review paper summarizes computational models that use smoothed-particle hydrodynamics to simulate the fluid–structure interactions in complex biological systems.

Numerical study of parachute inflation process based on smoothed particle hydrodynamics fluid structure interaction method

2016 ◽  
Vol 47 (6) ◽  
pp. 1038-1059 ◽  
Author(s):  
Han Cheng ◽  
Chen Chen ◽  
Xiaohan Liu ◽  
Meng Li ◽  
Zhichao Chen ◽  
...  
Keyword(s):  
Flow Field ◽  
Smoothed Particle Hydrodynamics ◽  
Numerical Study ◽  
Fluid Structure Interaction ◽  
Numerical Results ◽  
Interaction Method ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

Shortcomings in large deformation calculations by mesh-based numerical methods have been overcome by smoothed particle hydrodynamics method, which is a new meshless algorithm based on Lagrange description and has been widely used in simulations as blasting and impacting, but not been applied in research of engineered fabrics yet. In this paper, a fluid structure interaction method coupling smoothed particle hydrodynamics and finite element was proposed, by which the inflating process of a model parachute was investigated. In the modeling of parachute, the same nodes were shared by beam elements of reinforced belts and adjacent canopy elements to simulate the elastic constraints, while the parachute meshes model was adjusted to satisfy requirement of fluid structure interaction calculation by loading internal pressure, and surrounding flow field was described by smoothed particle hydrodynamics particles. Then, the fluid structure interaction calculating could be realized by contacting algorithm between particles and mesh nodes. The dynamic processes of expanding structure and flow field were obtained by this method. According to the analysis of numerical results, the parachute inflating process could be divided into pre-inflating stage, fully inflating stage and inflated stage; moreover, the noise occurred in wind tunnel experiment could be explained by this method. The “breathing” phenomenon and top collapsing of canopy appeared in numerical results, as corresponded to the tunnel experiment. This new method could be a good supplement in parachute design and research.

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