【摘要】 格子Boltzmann方法具有天然的并行特性，将其引入水沙运动模拟有助于提高计算效率。参考常用水沙数学模型控制方程，建立了基于多分布函数耦合的平面二维水沙运动模拟格子Boltzmann模型，并实现了图形处理器（graphics processing unit, GPU）并行计算。通过对断面突扩和90°分汊河道这2个典型算例进行模拟，并与有限体积法及商业软件MIKE 21计算结果对比分析，初步验证了模型的正确可行性，经过进一步改进和拓展，该模型有望成为一种模拟大规模泥沙输运问题的有效手段。更多还原

【Abstract】 Lattice Boltzmann method is characterized by intrinsic parallel structure, and introducing it into sediment transport simulation has the prospect of improving computational efficiency. In this study, with reference to the governing equations of widely-used mathematical model for sediment transport, a depthaveraged 2D lattice Boltzmann model that couples multiple distribution functions is proposed for simulating flow and sediment transport, and its GPU(graphics processing unit) parallel computation is realized. The feasibility of proposed model is preliminatively verified by simulating two typical cases, namely sediment transport in the sudden expansion channel and the 90° bifurcated channel, and comparing with finite volume method and commercial software MIKE 21 results. It is indicated that this model has potentials to simulate large-scale sediment transport problems after further improvement and enhancement.更多还原