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可侵蚀地表上方含尘大气运动的数值模型
Alternative TitleNumerial modelling of dusty atmospheric flows over an erodible surface
王柏懿; 陈强; 戚隆溪
Source Publication力学学报
2004-05-19
Volume36Issue:3Pages:265-271
Abstract在稀相气固两相流的双流体模型框架下,导出含尘大气运动的基本方程,其中的源项考虑相间双向耦合作用;通过对基本方程进行无量纲化,求得控制气相和弥散相动力学行为的相似准则,包括弗洛德数、罗斯贝数、颗粒雷诺数、颗粒惯性参数、颗粒剪切横移参数、颗粒旋转横移参数和沙尘质量载荷率等.作为一个模型问题,研究可侵蚀地表上方充分发展湍流大气边界层流动对土壤颗粒的气动卷扬作用,其中计及气动阻力、萨弗曼升力和重力等因素的影响.为了克服由于沙尘跃移运动轨迹交叉导致流动参数多值性所造成的困难,引进拉格朗日坐标下弥散相连续方程.对两种不同风速和4种不同粒径条件下的沙尘运动进行数值模拟,给出相应情况中沙尘运动特性和密度分布剖面并讨论风速和粒径等参数的影响,还细致分析了含尘大气边界层中沙尘与气流之间的能量传递过程.所得的方程、准则和方法可以为土壤风蚀和沙尘暴等自然灾害的预报提供理论基础.
Keyword含尘大气
Indexed ByCSCD
Language中文
Funding Organization国家自然科学基金(19972069)
CSCD IDCSCD:1622797
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/41864
Collection力学所知识产出(1956-2008)
Corresponding Author王柏懿
Recommended Citation
GB/T 7714
王柏懿,陈强,戚隆溪. 可侵蚀地表上方含尘大气运动的数值模型[J]. 力学学报,2004,36,3,:265-271.
APA 王柏懿,陈强,&戚隆溪.(2004).可侵蚀地表上方含尘大气运动的数值模型.力学学报,36(3),265-271.
MLA 王柏懿,et al."可侵蚀地表上方含尘大气运动的数值模型".力学学报 36.3(2004):265-271.
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