Improved SPH simulation of spilled oil contained by flexible floating boom under wave–current coupling condition

Abstract

A multi-phase Smoothed Particle Hydrodynamics (SPH) method is developed to model the failure process of a flexible oil boom. An algorithm is proposed based on the dynamic boundary particles (DBPs) for preventing the particle disorders during the multi-fluid particle movement around the solid boundary. The improved multi-phase SPH model is firstly validated by the experimental data of a wedge falling into a two-layer oil-water fluid. Then a numerical wave-current flume is established with an active absorbing piston-type wave generator and a circulating current system. The model reliability is validated against the measured vertical profiles of velocity. Simulation of the flexible floating boom movement is implemented by introducing a Rigid Module and Flexible Connector (RMFC) multi-body system. The model is finally applied to the simulation of movement of a flexible floating boom in containing industrial gear oil under the combined waves and currents. Good agreements are obtained between the SPH modeling results and the experimental data in terms of the ambient wave-current field, hydrodynamic responses of the 2 floating body and evolution process of the oil slick for the flexible boom. The hydrodynamic responses and containment performances of the flexible floating boom are also compared with those of the rigid one. It is found from both the experimental and numerical results that two vortices of the water phase exist in the front and rear of the boom skirt and the size of the front vortex decreases with an increase of the current velocity while the wake vortex is reversed. It is also found that the skirt of the flexible boom has a larger magnitude of the swaying and rolling than the rigid one and the maximum quantity of the escaped oil of a flexible boom within one wave cycle is about 5% more than a rigid one under the present test conditions.

Lubrication of Gearboxes: CFD Analysis of a Cycloidal Gear Set

“…Some research was conducted by the author in order to improve the computational efficiency of the numerical methods [25], [26]. SPH based methods were presented by Groenenboom et al [27], Liu et al [28], Ji et al [29], Shi et al [30], Rahmatjan and Geni [31], Imin and Geni [32], Zhigang et al [33] and Liu et al [34]. A review article showing advantages and limitation of all the available models was presented by Concli and Gorla [35].…”

A Meshless WCSPH Boundary Treatment for Open‐Channel Flow over Small‐Scale Rough Bed

“…e SPH method is a widely used Lagrangian meshless method that was originally developed by Gingold and Monaghan [1] and Lucy [2] to solve astrophysics problems and later used in fluid dynamics applications such as fluid-structure interaction [3][4][5], underwater explosion [6,7], local scour [8,9], other transport phenomena [10], and related applications [11][12][13]. Despite advances in SPH methodology, the SPH method has not yet been widely adopted for the simulation of open-channel flows in natural rivers and artificial channels.…”

Using Technical Means and Logistics Principle Applications to Solve Ecological Water Course Accidents

“…Another publication in this area describes the simulation of the flexible floating boom movement, which is implemented by introducing a Rigid Module and Flexible Connector (RMFC) multi-body system. The model is finally applied to the simulation of movement of the flexible floating boom in containing industrial gear oil under the combined waves and currents [7].…”

“…The scientific paper created by Shi, Li, Chen et al, is focused on a multi-phase smoothed particle hydrodynamics (SPH) method developed to model the failure process of a flexible oil boom. The proposed algorithm is based on the dynamic boundary particles (DBPs) for preventing particle disorders of multi-phase fluid particle movement around a solid boundary [26].…”