Numerical estimation of the wave forces acting on a three-dimensional body on submerged breakwater

Hur, Dong-Soo; Mizutani, Norimi

doi:10.1016/s0378-3839(02)00128-x

Cited by 81 publications

(24 citation statements)

References 7 publications

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“…Finite difference methods are employed to perform the numerical calculation to solve the governing Eqs. (1)-(4) and (11). The central difference approximation is adopted for solving the continuity equation.…”

Section: Difference Approximations Of Governing Equationsmentioning

confidence: 99%

Numerical study of wave loads on a caisson-pile-deck composite structure over permeability seabed

Guo

Zhang

Pei

2012

J. Shanghai Jiaotong Univ. (Sci.)

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To get the accurate wave loads on wharf composite structure, the wave force on small-scale piles and the uplift force on lower surface of caisson must be considered. Based on the Reynolds averaged Navier-Stokes (RANS) equations, the pore media theory and the volume of fluid (VoF) method, a three-dimensional numerical model is established. The model has been developed to simulate wave interaction with a composite structure including caisson, piles and deck. The numerical results agree very well with the experimental data on total force. The spatial distributions of the non-dimensional wave height and the maximum of wave pressure on surface of composite structure are presented and discussed. The effects of relative caisson length, relative wave height and relative caisson height on horizontal wave force are given. The result indicates that the horizontal wave force achieves maximum value at the relative caisson length of 0.18 and increases linearly with the increase of the relative caisson and wave height. It is proved that the model is an accurate and efficient numerical tool to investigate different problems of wave-structure interaction. Key words: permeable seabed, volume of fluid (VoF), wave force, composite structure CLC number: TV 139.2 Document code: A IntroductionGravity caisson and pile type structures are two important kinds of pier structures. Both of them have advantages and disadvantages. As deepwater open sea pier is developed, pure gravity pier shows obvious disadvantages (such as high cost and bigger wave force). A new offshore-type composite structure is proposed. The composite structure, combined with bottom caisson, middle piles and deck, makes full use of wave energy concentrating on the surface of sea water to reduce the wave impacts on the structure as well as structural responses to wave attacks. It remains stable by using its own weight. The study on the wave load calculation method and dynamics of the composite structure was reported seldom. There is no engineering application at present. In order to use this structure efficiently, an accurate prediction model of three-dimensional (3D) interaction between the wave and the composite structure should be constructed and developed.Numerical modeling of 3D free surface flows [1][2] has become computationally affordable nowadays. Some 3D numerical-wave-tanks [1][2][3][4][5][6] were developed for simulating wave-structure interactions based on the volume of fluid (VoF) method. These models allowed to calculate velocity field in the whole computational domain for many types of flows, whether rotational or irrotational. These studies were successfully applied to many kinds of structures, e.g., cylinder [3] , submerged obstruction [7] or vertical porous structure [3] . The calculation of wave forces on small scale cylinders near by large scale object is few. Laboratory model studies and numerical modeling have been carried out to investigate the wave slamming force on horizontal structures, such as plates [4][5] . However, at the present time, there...

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Section: Difference Approximations Of Governing Equationsmentioning

confidence: 99%

Numerical study of wave loads on a caisson-pile-deck composite structure over permeability seabed

Guo

Zhang

Pei

2012

J. Shanghai Jiaotong Univ. (Sci.)

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“…One class of free-surface flow models simulates the details of this boundary. Schemes such as marker and cell [11], volume of fluid [12], arbitrary Lagrangian-Eulerian [13] and level-set method [14] are among the methods of this class. All of these methods are associated with relatively large computational cost.…”

Section: Introductionmentioning

confidence: 99%

A three‐dimensional non‐hydrostatic vertical boundary fitted model for free‐surface flows

Badiei

Namin

Ahmadi

2007

Numerical Methods in Fluids

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SUMMARYA non-hydrostatic finite volume model is presented to simulate three-dimensional (3D) free-surface flows on a vertical boundary fitted grid system. The algorithm, which is an extension to the previous two dimensional vertical (2DV) model proposed by Ahmadi et al. (Int. J. Numer. Meth. Fluids 2007; 54(9):1055-1074), solves the complete 3D Navier-Stokes equations in two major steps based on projection method. First, by excluding the pressure terms in momentum equations, a set of advection-diffusion equations are obtained. In the second step, the continuity and the momentum equations with the remaining pressure terms are solved which yields a block tri-diagonal system of equations with pressure as the unknown. In this step, the 3D system is decomposed into a series of 2DV plane sub-systems which are solved individually by a direct matrix solver. Iteration is required to ensure convergence of global 3D system. To minimize the number of vertical layers and subsequently the computational cost, a new top-layer pressure treatment is proposed which enables the model to simulate a range of surface waves using only 2-5 vertical layers.

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“…Interesting examples of how these issues have been addressed both physically and numerically are, for instance reported in [2], [3], [7], [9], [8], [10], [12], [13], [14].…”

Section: The Modeling Unsaturated Flow Through Pavementsmentioning

confidence: 99%

Numerical simulation of a 3-D flow within a storage area hexagonal modular pavement systems

Rashid

Abustan

Hamzah

2013

IOP Conf. Ser.: Earth Environ. Sci.

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Numerical estimation of the wave forces acting on a three-dimensional body on submerged breakwater

Cited by 81 publications

References 7 publications

Numerical study of wave loads on a caisson-pile-deck composite structure over permeability seabed

Numerical study of wave loads on a caisson-pile-deck composite structure over permeability seabed

A three‐dimensional non‐hydrostatic vertical boundary fitted model for free‐surface flows

Numerical simulation of a 3-D flow within a storage area hexagonal modular pavement systems

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