A new approach to fluid–structure interaction within graphics hardware accelerated smooth particle hydrodynamics considering heterogeneous particle size distribution

2017 ◽  
Vol 5 (3) ◽  
pp. 387-409 ◽  
Author(s):  
Adnan Eghtesad ◽  
Marko Knezevic
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Fluid Structure Interaction ◽  
Graphics Hardware ◽  
Smooth Particle Hydrodynamics ◽  
New Approach ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Particle Hydrodynamics

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.

Fluid-Structure Interaction Simulation With Free Surface Flows by Smoothed Particle Hydrodynamics

2008 ◽  
Author(s):  
M. H. Farahani ◽  
N. Amanifard ◽  
H. Asadi ◽  
M. Mahnama
Keyword(s):  
Free Surface ◽  
Fluid Structure Interaction ◽  
Free Surface Flows ◽  
Surface Flows ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Incompressibility Constraint ◽  
Sph Algorithm

Simulation of the fluid-structure interaction (FSI) and free surface flows includes an area of extremely challenging problems in the computational mechanics community. In this paper, a newly proposed SPH algorithm is employed to simulate FSI problems with complex free surface flows. In this way, fluid and elastic structure continua are coupled using a monolithic but explicit numerical scheme. The proposed method is similar to so-called SPH projection method and consists of three steps. The first two steps play the role of prediction, while in the third step a Poisson equation is used for both fluid and structure to impose incompressibility constraint.

Multiphysics Study of Structural Impact to Fluidic Media

2011 ◽  
Vol 673 ◽  
pp. 1-10 ◽  
Author(s):  
Matej Vesenjak ◽  
Zoran Ren ◽  
Mojtaba Moatamedi
Keyword(s):  
Impact Loading ◽  
Numerical Study ◽  
Fluid Structure Interaction ◽  
Water Impact ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Particle Hydrodynamics ◽  
Ale Methods ◽  
Smoothed Particle ◽  
Space Capsule

The paper presents a fluid structure interaction based numerical study of impact loading for a hemispherical structure upon water and a space capsule water landing. The study has a strong relevance in the determination of the crashworthiness of aerospace structures upon water impact loading. Finite element based numerical techniques have been used for the analysis of the underlying transient dynamic and fluid-structure interaction. Smoothed Particle Hydrodynamics (SPH) and Arbitrary Lagrange-Eulerian (ALE) methods have been used to simulate the behaviour of the fluid (water) under impact conditions. The accelerations and velocities of the impacting objects have been validated with by experimental measurements and analytical results. Numerical analyses showed a strong potential for the use of developed computational fluid structure interaction models for analyses of water impact loading related problems.

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