The current study introduces a new particle–particle collision model as well as a classical particle–wall collision model to simulate the process of bedload transport. Large eddy simulation and two-way coupling Lagrangian point–particle models also are applied. Flow conditions for all simulations are done based on previous experiments and four comparison cases are studied. The bedload function result obtained using this model agrees with the previous studies, which proves that the model is reasonable and effective in dealing with bedload transport in turbulent flow. Otherwise, failure to consider the particle–particle collision, Basset force, or Saffman lift force in the model lead to underestimating the bedload transport rate.

目前的研究引入了一种新的粒子 - 粒子碰撞模型以及经典的粒子 - 壁碰撞模型来模拟床载荷传输过程。还应用了大涡模拟和双向耦合拉格朗日点-粒子模型。所有模拟的流动条件都是基于先前的实验完成的，并研究了四个比较案例。使用该模型得到的床荷载函数结果与前人的研究结果一致，证明该模型在处理湍流中的床荷载输运时是合理有效的。否则，模型中未考虑粒子-粒子碰撞、巴塞特力或萨夫曼升力会导致低估床载传输率。