Department of Civil Engineering, University of Transport and Communications, 3 Cau Giay, Lang Thuong, Dong Da, Hanoi, Vietnam.
Mines Douai, Department of Polymers and Composites Technology & Mechanical Engineering, 941 rue Charles Bourseul, CS 10838, F-59508 Douai Cedex France.
Math Biosci Eng. 2019 Jun 11;16(5):5395-5418. doi: 10.3934/mbe.2019269.
This paper presents a coupled two-phase flow model for simulation of submerged flow bridge scour under dam-break flows considering the sediment-fluid interaction. The Smoothed Particle Hydrodynamics (SPH) method is employed to simulate the sediment and fluid movements based on the Newtonian and non-Newtonian fluids, respectively, in the framework of two-phase flow modeling. The SPH simulation based on the treatment of Bingham-type Herschel-Bulkley-Papanastasiou constitutive model and the Drucker-Prager yield criterion is used to predict the sediment transport and the scour depth time histories under a submerged bridge deck. The influence of parameters such as geometry of the bridge deck and flow conditions on the scour depth is also investigated.
本文提出了一种考虑泥沙-水流相互作用的淹没流动桥墩冲刷的耦合两相流模型，用于模拟溃坝水流下的冲刷过程。基于牛顿和非牛顿流体，分别采用光滑粒子流体动力学（SPH）方法模拟泥沙和流体的运动，在两相流模型的框架内进行。基于宾汉型赫谢尔-布尔克里-帕潘斯塔休本构模型和德鲁克-普拉格屈服准则的 SPH 模拟，用于预测淹没桥面板下的泥沙输移和冲刷深度时程。还研究了桥面板几何形状和水流条件等参数对冲刷深度的影响。
