新月形沙丘表面流场特征

罗霖炎, 高鑫, 赵永成

The surface flow pattern characteristics of barchan dunes

Linyan Luo, Xin Gao, Yongcheng Zhao

图3 不同工况下距离地表0.1 m处计算域中轴线上的水平风速分布（沙丘背风坡坡脚处为X轴的坐标零点）。A为不同沙丘高度工况；C为不同迎风坡坡度工况；E为不同来流风速工况；B、D和F分别为涡流区和保护区与沙丘高度、迎风坡坡度和来流摩阻风速的关系

Fig. 3 The horizontal wind velocity distribution of the axis of the calculation domain at 0.1 m from the barchan dune surface under different working conditions （The zero point of the x-axis coordinates is located in the leeward slope toe of the dune）. A： Different dune heights. C： Different windward slope gradients. E： Different inlet velocities. B， D and F are the relationship between vortex zone and protected zone and dune heights， windward slope gradients and inlet shear velocities， respectively