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sph modelling of the Vortex-Induced Vibration of A Near-Wall Cylinder

China Ocean Engineering 2023年第3期37卷 355-368页

作者： WEN Hong-jie ZHAO Yu-meng ZHU Gan-cheng ZHU Liang-sheng REN Bing School of Civil Engineering and Transportation South China University of TechnologyGuangzhou 510641China China State Construction Engineering Corporation Limited Beijing 100029China Institute of Ocean Engineering Ningbo UniversityNingbo 315211China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

The frequency-locked phenomenon commonly occurs in the vortex-induced vibration(VIV)of bluff *** simulation of this lock-in behavior is challenging,especially when the structure is positioned in close proximity to a solid *** establish a robust simulator,an enhanced smoothed particle hydrodynamic(sph)model is *** sph model incorporates a particle shifting algorithm and a pressure correction algorithm to prevent cavity formation in the structure's wake area.A damping zone is also established near the outlet boundary to dissipate the vortices that shed from the ***,GPU parallel technology is implemented to enhance the sph model's computational *** validate the mo del,the predicted results are compared with the available refere nce data for flow past both stationary and oscillating *** verified sph model is then employed to comparatively investigate the motion re sponse,lift characteristic,and vortex shedding mode of cylinders with and without accounting for the effect of boundary *** analyses demonstrate that the developed sph model is a proficient tool for efficiently simulating the vibration of near-wall bluff bodies at low Reynolds number.

关键词： sph model VIV near-wall cylinder Reynolds number GPU

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sph modeling of Droplet Impact on Solid Boundary

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Transactions of Tianjin University 2014年第2期20卷 112-117页

作者：李大鸣白玲李玲玲赵明宇 State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University Hebei Research Institute of Investigation and Design of Water Conservancy and Hydropower

A droplet undergoes spreading,rebounding or splashing when it impacts solid boundary,which is a typical phenomenon of free surface flow that exists widely in modern *** particle hydrodynamics(sph)method is applied to numerically study the dynamical behaviors of the droplet impacting solid boundary,and both the spreading and rebounding phenomena of the droplet are reproduced in the *** droplet deformation,flow fields and pressure fields inside the droplet at different moments are *** important factors,the initial velocity and diameter,are discussed in determining the maximum spreading factor,revealing that the maximum spreading factor increases with the increase of the impact velocity and droplet diameter respectively.

关键词： sph model droplet impact solid boundary maximum spreading factor

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