【摘要】 在对排沙漏斗的计算区域作了特殊处理后,选用适当的边界条件,采用VOF方法追踪自由水面,结合RNG双方程湍流模型,对排沙漏斗内三维两相流场作了数值模拟,给出了水面线、静压、速度等参数的分布。将数值计算得到的流速分布与试验实测结果进行了对比,两者吻合较好。计算结果对研究排沙漏斗的流场特性和输沙机理以及优化排沙漏斗设计具有一定的指导意义。更多还原

【Abstract】 The computation region of the sand funnel is treated by special means so that some reasonable boundary conditions can be adopted.Volume of Fluid(VOF) method is introduced to trace free-surface.The RNG model is used for turbulence modeling,all of which is combined.The 3-D water-air two-phase flow field in the sand funnel is simulated,and free-surface position,static pressure and velocity distribution are obtained.The comparison between velocity distribution and experimental results obtained from numerical calculation was conducted.The computed result has some instructive significance to study the characteristic of flow field in the sand funnel.更多还原