基于Fluent的波浪对海岸冲击的数值模拟

Numerical Simulation for Impact of Waves on Coast Based on Fluent

在Fluent软件的基础上,通过流体体积算法,数值模拟波高为0.2m、周期为1.5s、波长为3.5m的波浪对墙体的冲击过程,重点研究波浪对墙体的冲击力作用和网格尺寸对流场变化的影响。由模拟结果得出:墙体受到的冲击压力在时间历程上具有一定的周期性,但冲击压力的峰值具有一定的随机性;网格尺寸不同会导致自由面重构的不同,从而使流体体积法捕捉到的流场速度和压力不同,网格越精细,捕捉到的冲击压力更精确。

On the basis of Fluent software,Volume of Fluid(VOF)algorithm is used to numerically simulate the impact of waves on the wall under certain conditions that wave height is 0.2 m,wave period is 1.5 sand wave length is 3.5 m.Main attention is paid to the impact pressure,velocity field and the effects of grid size on the characteristics of the flow field.The simulation results show that:the impact pressure on the wall is of some periodicity in time history but the peak of the impact pressure is of some randomness;different grid sizes will affect different reconstructions of the free surface,so that the speed and pressure of the flow field captured by the VOF method are different,and the finer the grid,the more accurate the captured impact pressure is.