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Numerical Study on Aeolian Sand Ripples Forming and Moving Process in Desert Highway

机译：沙漠公路风沙起伏形成与运动过程的数值研究

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In this paper, the sand break into highway problem in desert, which is caused by the sand flow blown by wind, is studied. The mathematical models are introduced by considering the fixed, semi-fixed and free sand desert fields based on the fluid dynamics and the sand particle dynamics. Different kinds of numerical models are made by changing the desert highway height, wind flow direction and its uniformity. The weak coupling method is used due to spatial relationships between air flow field and the sand flow field. Finally, by coupling the airflow field and sand flow field with desert highway, the numerical simulations of sand forming process on desert highway are conducted. The numerical results shown, that the wind blown sand breaks into highway easier when wind direction perpendicular highway and if the highway height higher than the range size of the sand surface the wind blown sand break into highway is more difficult.
机译：本文研究了风吹沙流引起的沙漠中沙粒闯入高速公路的问题。基于流体动力学和沙粒动力学，通过考虑固定，半固定和自由沙漠场来引入数学模型。通过改变沙漠公路的高度，风向和均匀性，可以建立不同的数值模型。由于空气流场与砂子流场之间存在空间关系，因此使用了弱耦合方法。最后，通过将气流场和沙流场与沙漠公路相结合，对沙漠公路上成砂过程进行了数值模拟。数值结果表明，当风向垂直于高速公路时，风沙容易进入高速公路；如果高速公路高度大于砂面的范围大小，则风沙难以进入高速公路。

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