SPH Numerical Modeling for the Wave–Thin Structure Interaction

In this paper, a numerical model of 2D weakly compressible smoothed particle hydrodynamics (WCSPH) is developed to simulate the interaction between waves and thin structures. A new color domain particle (CDP) technique is proposed to overcome difficulties of applying the ghost particle method to thi...

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Bibliographic Details
Published in:China ocean engineering 2018-04, Vol.32 (2), p.157-168
Main Authors: Ren, Xi-feng, Sun, Zhao-chen, Wang, Xing-gang, Liang, Shu-xiu
Format: Article
Language:English
Subjects:
Coastal Sciences
Color
Colour
Compressibility
Computation
Computational fluid dynamics
Computer simulation
Engineering
Fluid flow
Fluid- and Aerodynamics
Hydrodynamics
Marine & Freshwater Sciences
Mathematical models
Modelling
Numerical and Computational Physics
Oceanography
Offshore Engineering
Pressure distribution
Regular waves
Simulation
Smooth particle hydrodynamics
Stress concentration
Structures
Thickness
Thin plates
Two dimensional models
Water levels
Waves
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Summary:In this paper, a numerical model of 2D weakly compressible smoothed particle hydrodynamics (WCSPH) is developed to simulate the interaction between waves and thin structures. A new color domain particle (CDP) technique is proposed to overcome difficulties of applying the ghost particle method to thin structures in dealing with solid boundaries. The new technique can deal with zero-thickness structures. To apply this enforcing technique, the computational fluid domain is divided into sub domains, i.e., boundary domains and internal domains. A color value is assigned to each particle, and contains the information of the domains in which the particle belongs to and the particles can interact with. A particle, nearby a thin boundary, is prevented from interacting with particles, which should not interact with on the other side of the structure. It is possible to model thin structures, or the structures with the thickness negligible with this technique. The proposed WCSPH module is validated for a still water tank, divided by a thin plate at the middle section, with different water levels in the subdomains, and is applied to simulate the interaction between regular waves and a perforated vertical plate. Finally, the computation is carried out for waves and submerged twin-horizontal plate interaction. It is shown that the numerical results agree well with experimental data in terms of the pressure distribution, pressure time series and wave transmission.
ISSN:0890-5487
2191-8945
DOI:10.1007/s13344-018-0017-x