| 非稳态沙波纹流场的数值模拟 |
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| 引用本文： | 佟鼎,蒋红,黄宁.非稳态沙波纹流场的数值模拟[J].计算力学学报,2008,25(Z1). |
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| 作者姓名： | 佟鼎 蒋红 黄宁 |
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| 作者单位： | 兰州大学西部灾害与环境力学教育部重点实验室; |
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| 基金项目： | 国家自然科学基金
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国家自然科学基金
，
教育部新世纪优秀人才支持汁划
，
教育部高等学校博士学科点专项科研基金
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| 摘 要： | 风成沙波纹是沙质地表在风力作用下形成的最基本的地貌类型.本文研究了沙波纹在形成过程中,风场对波纹的形态变化的响应.采用目前比较流行的有限体积法,通过求解非稳态情况下的Navier-Stokes方程来计算风场;地表形态采用阶梯网格进行逼近,为了对地表形态变化进行有效的控制,根据相关参数采用正弦函数作为沙波纹的基本形状;最后根据计算结果详细讨论了沙波纹从形成到稳定的发展过程中地表流场的行为变化特征.
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| 关 键 词： | 沙波纹 simpler算法 非稳态 有限体积法 |
Numerical simulation of non-steady airflow over sand ripples |
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| TONG Ding,JIANG Hong,HUANG Ning.Numerical simulation of non-steady airflow over sand ripples[J].Chinese Journal of Computational Mechanics,2008,25(Z1). |
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| Authors: | TONG Ding JIANG Hong HUANG Ning |
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| Institution: | Key Laboratory of Mechanics on Disaster and Environment in Western China Lanzhou University;Ministry of Education;Lanzhou 730000;China |
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| Abstract: | Sand ripple is one of the most basic geomorphological types formed by wind over sandy landforms.In this article,we discussed the response of flow field to the developing of sand ripple in the forming process of sand ripples.On the base of solving the N-S equation,the wind field was got by using the finite volume method.Here,staircase grids used to approach the real surface configuration and according to relevant parameter,we assumed that the basic shape of sand ripples approximate to a sine function,for eff... |
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| Keywords: | sand ripple finite volume method staircase grids N-S equation non-stable |
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