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Modelling transverse dunes

机译:模拟横向沙丘

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摘要

Transverse dunes appear in regions of mainly unidirectional wind and high sand availability. A dune model is extended to two-dimensional calculation of the shear stress. It is applied to simulate dynamics and morphology of three-dimensional transverse dunes. In the simulations they seem to reach translational invariance and do not stop growing. Hence, simulations of two-dimensional dune fields have been performed. Characteristic laws were found for the time evolution of transverse dunes. Bagnold's law of the dune velocity is modified and reproduced. The interaction between transverse dunes led to the interesting conclusion that small dunes can travel over bigger ones.
机译:横向沙丘出现在主要是单向风和高可用沙量的地区。沙丘模型扩展到剪切应力的二维计算。它用于模拟三维横向沙丘的动力学和形态。在模拟中,它们似乎达到了平移不变性并且没有停止增长。因此,已经进行了二维沙丘场的模拟。发现了横向沙丘随时间变化的特征定律。沙丘速度的巴格诺定律被修改和再现。横向沙丘之间的相互作用得出一个有趣的结论,即小沙丘可以越过大沙丘。

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