Numerical Study on Aeolian Sand Ripples Forming and Moving Process in Desert Highway
Numerical Study on Aeolian Sand Ripples Forming and Moving Process in Desert Highway
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DOI：
10.4028/www.scientific.net/kem.462-463.1032
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发表时间：
2011-01
期刊：
影响因子：
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通讯作者：
Abdurahman Ablimit;Mamtimin Gheni;Z. Xu;Mamatjan Tursun;Xamxinur Abdikerem
中科院分区：
文献类型：
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作者：
Abdurahman Ablimit;Mamtimin Gheni;Z. Xu;Mamatjan Tursun;Xamxinur Abdikerem
本文针对风沙流引起的沙漠公路沙侵问题进行了研究。基于流体动力学和沙粒动力学，引入了考虑固定、半固定和自由沙地荒漠场的数学模型。通过改变沙漠公路高度、风向及其均匀度，建立不同类型的数值模型。由于空气流场和沙流场之间的空间关系，采用弱耦合方法。最后，通过将气流场和沙流场与沙漠公路耦合，对沙漠公路上的成砂过程进行数值模拟。数值结果表明，当风向垂直于公路时，风沙更容易侵入公路，而当公路高度高于沙面范围大小时，风沙更难侵入公路。
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.