Fully nonlinear simulation for fluid/structure impact: A review

Sun, Shuzheng; Wu, G.X.

doi:10.1007/s11804-014-1253-y

Cited by 9 publications

(2 citation statements)

References 57 publications

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“…Also, other variations of the BEM have been developed such as Sun and Faltinsen (2009)'s BEM with a flow separation model and Cheng et al (2018)'s higher-order BEM. However, the BEM has challenges on the viscous flows and the breaking waves, due to the assumption of the inviscid, irrotational fluid (Sun and Wu, 2014).…”

Section: Introductionmentioning

confidence: 99%

Parametric studies on the water impact of one and twin free-falling wedges by a Cartesian grid multiphase flow model

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Parametric studies on the water impact of one and twin free-falling wedges by a Cartesian grid multiphase flow model

et al. 2022

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“…These models have been applied to simulated tsunami generation and [1] overturning waves [2][3][4], to design breakwaters [5,6], to predict the wave pressure impact on structures [7], or to study radiation and diffraction waves produced by a wave-maker [8][9][10][11]. Nowadays, because of the increasing interest on the ocean renewable energy, in which the generation systems are installed near-shore or off-shore, new applications of such models are being used to study the fluid-structure interaction considering the effect of the waves [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A 3d Isogeometrical Boundary Element Analysis for Non-Linear Gravity Wave Propagation

Maestre¹,

Pallarès²,

Cuesta³

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. In this paper we describe a three-dimensional Isogeometric BEM in the time domain based on the T-spline and Non Uniform Rational B-Splines (NURBS) basis to study the free surface behavior. Traditionally, the Lagrange polynomials have been used to discretize the geometry and the BEMs variables. The Lagrange basis are discontinues across the elements although the physical variables are continuous. In dynamics problems with high mesh distortions this approach can produce numerical instabilities that can be quickly propagated. This problem could be overcome using T-spline or NURB basis. The main advantages of this approach are: (1) the control of the continuity and smoothness of the T-spline and NURBS basis, which makes the model numerically stable without the need of artificial smooth techniques;(2) the high order geometrical approximation by non-rational splines;(3) the refinement capabilities without affecting the geometry and BEM's variables; and (4) the direct integration with computer aid geometrical design tools. We use the concept of the Bézier extraction operation which provides an element point of view of the T-Spline and NURBS similar to the traditional finite element. The boundary integral Equation is solved at each time step by the GMRES algorithm and the time marching scheme is performed with a fourth-order Runge-Kutta method to update the model. Additionally, the hydrodynamic force is calculated by an auxiliary boundary equation. Some numerical benchmark examples are analysed to show the accuracy and the stability of the method 7967 J. Maestre, J. Pallarés and I. Cuesta

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Free surface flow generated by submerged twin-cylinders in forward motion using a fully nonlinear method

Ren

Sun

2015

J. Marine. Sci. Appl.

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The free surface flow generated by twin-cylinders in forced motion submerged beneath the free surface is studied based on the boundary element method. Two relative locations, namely, horizontal and vertical, are examined for the twin cylinders. In both cases, the twin cylinders are starting from rest and ultimately moving with the same constant speed through an accelerating process. Assuming that the fluid is inviscid and incompressible and the flow to be irrotational, the integral Laplace equation can be discretized based on the boundary element method. Fully-nonlinear boundary conditions are satisfied on the unknown free surface and the moving body surface. The free surface is traced by a Lagrangian technique. Regriding and remeshing are applied, which is crucial to quality of the numerical results. Single circular cylinder and elliptical cylinder are calculated by linear method and fully nonlinear method for accuracy checking and then fully nonlinear method is conducted on the twin cylinder cases, respectively. The generated wave elevation and the resultant force are analysed to discuss the influence of the gap between the two cylinders as well as the water depth. It is found that no matter the kind of distribution, when the moving cylinders are close to each other, they suffer hydrodynamic force with large absolute value in the direction of motion. The trend of force varying with the increase of gap can be clearly seen from numerical analysis. The vertically distributed twin cylinders seem to attract with each other while the horizontally distributed twin cylinders are opposite when they are close to each other.

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Fully nonlinear simulation for fluid/structure impact: A review

Cited by 9 publications

References 57 publications

Parametric studies on the water impact of one and twin free-falling wedges by a Cartesian grid multiphase flow model

Parametric studies on the water impact of one and twin free-falling wedges by a Cartesian grid multiphase flow model

A 3d Isogeometrical Boundary Element Analysis for Non-Linear Gravity Wave Propagation

Free surface flow generated by submerged twin-cylinders in forward motion using a fully nonlinear method

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