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1. Numericle simulation of the formation of linear dunes | |||
Zhang Ruyan,Luo Chunmei | |||
Earth Science 17 October 2010 | |||
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Abstract:Three-dimensional flow above the sand dunes have been studied numerically by using Large-Eddy Simulation (LES) method. In the flow direction and span direction cyclic boundary conditions are imposed for velocity and pressure. The movement of the sand which is known as the elemental types of desert have been investigated. The numerical method employed in this study can be divided into three parts: (i) calculation of the air flow above the sand dunes using standard MAC method with a generalized coordinate system; (ii) estimation of the sand transfer caused by the flow through the friction; (iii) determination of the shape of the ground. Since the computational area has been changed due to step (iii), steps (i)-(iii) are repeated until prescribed times. The simulated dunes, which is formed by two directional winds, extends at the converging direction which is known as linear dunes. | |||
TO cite this article:Zhang Ruyan,Luo Chunmei. Numericle simulation of the formation of linear dunes[OL].[17 October 2010] http://en.paper.edu.cn/en_releasepaper/content/4387969 |
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