Predicting solid particle transport in the lowest parts of the atmosphere is a major issue for man-made obstacles in semi-arid regions. Here, we investigate the effects on solid particle saltation, of square obstacles on the ground with different spacings. The aerodynamic field is determined by large eddy simulations coupled with an immersed boundary method for the obstacles. Solid particles are tracked by a Lagrangian approach. Take-off and rebound models are introduced for the interaction of particles with the wall. Without particles, fluid velocity profiles are first compared with experiments (Simoens et al., 2007, https://doi.org/10.1016/j.atmosenv.2007.08.013) showing good agreement. Special focus is put on the recirculation zone that plays an important role in solid particle entrapment.

中文翻译：

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湍流边界层中多个二维方形障碍物上粒子传输和沉积的大涡模拟

预测大气最低部分的固体粒子传输是半干旱地区人造障碍物的主要问题。在这里，我们研究了地面上不同间距的方形障碍物对固体颗粒跳跃的影响。空气动力场由大涡模拟和障碍物浸入边界法确定。通过拉格朗日方法跟踪固体颗粒。为粒子与壁的相互作用引入了起飞和回弹模型。在没有粒子的情况下，流体速度剖面首先与实验（Simoens 等人，2007，https://doi.org/10.1016/j.atmosenv.2007.08.013）进行比较，显示出良好的一致性。特别关注在固体颗粒截留中起重要作用的再循环区。