中文摘要：

采用FLUENT软件与光滑粒子流体动力学法（SPH）分别对溃坝水流进行数值模拟,对比分析溃坝水流的流动形态、流速及水位变化.结果表明,两者较为一致地反映了溃坝水流的流动过程及流体的速度场,其中SPH方法能精确地捕捉自由液面,所得自由水面附近结果更为准确;FLUENT所计算的流速、水位等数据更加精确,能很好地体现水流的表面张力.分析两种方法各自的优缺点和适用性,使其在面对复杂的工程实际问题时发挥更大的作用,促进溃坝洪水数学模型的应用与发展.

英文摘要：

By use of FLUENT software and the Smoothed Particle Hydrodynamics（SPH） method to simulate dam-break flow,we studied different results of dam water flow patterns and velocity field.The research results show that both methods can reflect dam-break flow patterns and the fluid velocity field consistently.SPH method can capture free surface more accurately.Regarding the calculation results of flow rate,water level and so on,FLUENT is more accurate,and it can reflect the surface tension of water very well.The advantages and disadvantages of both methods are analyzed to promote the development and application of the dam-break flood numerical model in dealing with complicated issues in hydraulic engineering.