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沙粒跃移运动的数值模拟
  • 期刊名称：计算力学学报(增刊)
  • 时间：0
  • 页码：33-37
  • 语言：中文
  • 分类：O35[理学—流体力学;理学—力学]
  • 作者机构：[1]兰州大学西部灾害与环境力学教育部重点实验室
  • 相关基金：国家自然科学基金(10532040;10872082)资助项目
  • 相关项目：风沙运动研究中的若干基本力学问题
作者： 马高生, 郑晓静|
关键词： 流体体积分数, 相间阻力, 风沙耦合, 输沙率
中文摘要：

沙粒在风场作用下形成的风沙运动,直接导致一系列环境问题。现有的数值模拟并没有揭示风沙流的二维性质。本文提出一种合理有效的模拟方法来揭示风沙流时空的变化。气相运动采用大涡模型,而固相(沙粒)处理为离散体系(DEM),并利用已有的沙粒与床面碰撞的激溅函数,以获得整个风沙系统运动特性。结果表明:其发展过程与以往的试验结果相比较符合;风沙流达到稳定后,不同截面输沙率沿高度分布与平均输沙率相比差别很大,并大约在9cm高处,平均输沙率出现极值,单宽输沙率沿风向分布同样具有非均匀性。

同期刊论文项目
沙尘暴期间沙尘释放通量分布的研究
期刊论文 20 会议论文 14 著作 2
风沙运动研究中的若干基本力学问题
期刊论文 53 会议论文 73 著作 1
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