Two-dimensional SPH simulations of wedge water entries

Oger, G.; Döring, M.; Alessandrini, B.; Ferrant, P.

doi:10.1016/j.jcp.2005.09.004

Cited by 328 publications

(148 citation statements)

References 16 publications

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“…However, most SPH applications have been documented in the coastal hydrodynamics, such as wave breaking (Monaghan and Kos, 1999;Dalrymple and Rogers, 2006), wave overtopping (Gomez-Gesteira et al, 2005) and wave interaction with breakwater (Rogers et al, 2010). Other areas of common SPH application are related to some rapid unsteady flows, such as dam break (Afshar and Shobeyri, 2010), water entry of an object (Oger et al, 2006) and landslide-induced wave (Ataie-Ashtiani and Shobeyri, 2008). It has been noted that very few SPH works are reported in the open channel flows.…”

Section: Introductionmentioning

confidence: 99%

Incompressible SPH simulation of open channel flow over smooth bed

Tan

Cheng

Xie

et al. 2015

Journal of Hydro-environment Research

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The Smoothed Particle Hydrodynamics (SPH) modelling techniques are used in a variety of coastal hydrodynamic applications, but only limited works have been documented in the open channel flows. In this paper, we use the incompressible SPH model combined with an improved inflow boundary scheme to investigate the open channel flows in a laboratory scale. The inflow and outflow boundary conditions are treated by generating and removing the fluid particles at the channel end. The proposed ISPH model has been applied to the open channel laminar and turbulent flows of different flow depths and the computational results have been verified against the analytical solutions. Model convergence has been investigated through the numerical tests using different particle spacings and time steps. The artificial boundary drag force of numerical nature has been found under certain flow conditions. As further application of the model, two additional tests are also carried out, involving alternative solid boundary treatment and more complex channel topography. The present study could provide useful information on further exploitation of the SPH modelling technique in river hydrodynamics.

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Section: Introductionmentioning

confidence: 99%

Incompressible SPH simulation of open channel flow over smooth bed

Tan

Cheng

Xie

et al. 2015

Journal of Hydro-environment Research

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“…Finally, in order to evaluate pressure an approach similar to the one presented by Oger et al (2006) was adopted, albeit simplified since pressure is evaluated as a mean of values computed for real particles in proximity of the boundary particle, i.e. in a rectangular region with width parallel to boundary surface and height perpendicular to boundary surface which are multiples of the smoothing length (in particular, a 4 × 10 region was considered).…”

Section: Smoothed Particle Hydrodynamics Method Adopted By Dinavmentioning

confidence: 99%

Comparison of experimental and numerical sloshing loads in partially filled tanks

Diebold¹,

Viviani²,

Souto-Iglesias³

et al. 2009

Analysis and Design of Marine Structures

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Sloshing phenomenon consists in the movement of liquids inside partially filled tanks, which generates dynamic loads on the tank structure. Resulting impact pressures are of great importance in assessing structural strength, and their correct evaluation still represents a challenge for the designer due to the high nonlinearities involved, with complex free surface deformations, violent impact phenomena and influence of air trapping. In the present paper a set of two-dimensional cases for which experimental results are available are considered to assess merits and shortcomings of different numerical methods for sloshing evaluation, namely two commercial RANS solvers (FLOW-3D and LS-DYNA), and two own developed methods (Smoothed Particle Hydrodynamics and RANS). Impact pressures at different critical locations and global moment induced by water motion for a partially filled tank with rectangular section having a rolling motion have been evaluated and results are compared with experiments.

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“…This is the direct factor of aforementioned load overestimation. Accelerations in 2-DoF asymmetric slamming are compared with experimental data [26] and another numerical simulation using SPH method [27] in Fig. 8 The error is greater in the case of angular acceleration calculation …”

Section: Symmetric and Asymmetric Wedge Water-entrymentioning

confidence: 99%

Simulation of Water-Entry and Water-Exit Problems Using a Moving Mesh Algorithm

Panahi¹

2012

Journal of Theoretical and Applied Mechanics

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Abstract. Simulation of the water-entry and water-exit particularly, at the interface of two phases i.e. water and air due to the effect of flow-induced loads, gravity force and trapped air cushion presence is very complicated. This paper attempts to introduce a finite volume-based moving mesh algorithm in order to simulate such problems in a viscous incompressible two-phase medium. The algorithm employs a fractional step method to deal with the coupling between pressure and velocity fields. Interface is also captured by solving a volume fraction transport equation. A boundary-fitted body-attached mesh of quadrilateral Control Volumes (CVs) is implemented to record hydrodynamic time histories of loads, motions and interfacial flow changes around the structure. Forced water-exit of a cylinder is simulated based on the introduced algorithm, together with free symmetric and asymmetric water-entry of wedges. Results show that the presented algorithm is favorably capable of assessing such complexities when comparing to experimental data.

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Two-dimensional SPH simulations of wedge water entries

Cited by 328 publications

References 16 publications

Incompressible SPH simulation of open channel flow over smooth bed

Incompressible SPH simulation of open channel flow over smooth bed

Comparison of experimental and numerical sloshing loads in partially filled tanks

Simulation of Water-Entry and Water-Exit Problems Using a Moving Mesh Algorithm

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