基于格子 Boltzmann 方法的复杂地形溃坝数值模拟

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摘要：文章通过DBM模型模拟了溃坝过程，并设计了几种建筑物排列方式来模拟溃坝时下游建筑物对溃坝水流的影响。实验表明，模拟结果与实际流动结果较符合，表明采用DBM模型能很好地模拟溃坝水流的演进过程。

关键词：浅水方程;离散Boltzmann方法;溃坝;数值模拟

中图法分类号：TV122文献标识码：A

Numerical simulation of dam break in complex terrain based onlattice Boltzmann method

OUYANG Jingyi

（State Key Laboratory of Hydraulics and Mountain River Engineering，Sichuan University，

Chengdu 610065，China）

Abstract：This paper simulates the dam-breaking process through the DBM model， and designs several building arrangements to simulate the influence of downstream buildings on the dam-breaking flow when the dam breaks. Experiments show that the simulation results are in good agreement with the actual flow results， indicating that the DBM model can well simulate the evolution process of the dam-breaking flow.

Key words： shallow water equation， discrete Boltzmann method， dam break， numerical simulation

1前言

溃坝是指堤坝等挡水建筑物瞬间溃决时水流突泄形成的洪水，是一种灾害性水流现象，其破坏力远大于一般洪水，会带来巨大的损失，所以对溃坝进行数值模拟十分必要。（剩余2603字）