栅栏阻沙机理的数值模拟研究

Numerical Simulation Research of Sand-Arresting Mechanism of Upright Fence

摘要: 采用欧拉–拉格朗日方法，数值计算0、40%两种疏透度栅栏周围的气流场和沙粒运动轨迹，对栅栏的阻沙机理进行了更全面的分析。结果表明，对来流风速实现大幅衰减并形成较大区域的低风速区，和确保沙粒运动轨迹流经低风速区是栅栏具有良好阻沙性能的两个必须条件，对进一步理解栅栏防护的动力机制具有参考意义。

Abstract: Numerical simulation of flow field and sand saltation trajectory around the upright fence with η = 0 and η = 40% was performed with Eulerian-Lagrangian model, and the sand-arresting mecha- nism of upright fence was analyzed. The results show that, for well anti sand performance of upright fence, it is necessary to achieve the wind velocity decrement and ensuring that the sand saltation trajectory locate in low wind speed region. Numerical simulation research is beneficial complementarity for traditional experiment study, and is helpful to reveal the sand-arresting mechanism of upright fence.