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明渠湍流边界层中颗粒的运动与分布

宋晓阳 及春宁 许栋

宋晓阳, 及春宁, 许栋. 明渠湍流边界层中颗粒的运动与分布[J]. 力学学报, 2015, 47(2): 231-241. doi: 10.6052/0459-1879-14-164
引用本文: 宋晓阳, 及春宁, 许栋. 明渠湍流边界层中颗粒的运动与分布[J]. 力学学报, 2015, 47(2): 231-241. doi: 10.6052/0459-1879-14-164
Song Xiaoyang, Ji Chunning, Xu Dong. DISTRIBUTION AND MOTION OF PARTICLES IN THE TURBULENTBOUNDARY LAYER OF CHANNEL FLOW[J]. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(2): 231-241. doi: 10.6052/0459-1879-14-164
Citation: Song Xiaoyang, Ji Chunning, Xu Dong. DISTRIBUTION AND MOTION OF PARTICLES IN THE TURBULENTBOUNDARY LAYER OF CHANNEL FLOW[J]. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(2): 231-241. doi: 10.6052/0459-1879-14-164

明渠湍流边界层中颗粒的运动与分布

doi: 10.6052/0459-1879-14-164
基金项目: 国家自然科学基金创新研究群体科学基金(51321065), 天津市青年科学基金(12JCQNJC02600, 12JCQNJC05600) 和国家自然科学基金(50809047, 51009105) 资助项目.
详细信息
    通讯作者:

    及春宁,博士,副教授,主要研究方向:泥沙动力学数值模拟.E-mail:cnji@tju.edu.cn

  • 中图分类号: TV142

DISTRIBUTION AND MOTION OF PARTICLES IN THE TURBULENTBOUNDARY LAYER OF CHANNEL FLOW

Funds: The project was supported by the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (51321065), Natural Science Foundation of Tianjin (12JCQNJC02600,12JCQNJC05600) and the National Natural Science Foundation of China (50809047, 51009105).
  • 摘要: 利用直接数值模拟、点球浸入边界法和颗粒离散元法相结合的方法, 模拟了颗粒在明渠湍流边界层中的运动, 并对颗粒的瞬时位置进行了Voronoi 分析, 定量研究了颗粒在湍流边界层中的运动和分布规律. 研究发现:颗粒的输运对湍流的统计特征有影响, 其运动与近壁区湍流拟序结构密切相关, 在"喷发"结构作用下被带离壁面, 在"扫掠" 结构和自身重力作用下回到壁面; 在湍流边界层中, 颗粒倾向于聚集在低流速带, 呈条带状分布;颗粒在大部分时间处于"簇"状态, 偶尔跳跃到"空" 状态, 但能够很快回到邻近低速区域.

     

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出版历程
  • 收稿日期:  2014-06-06
  • 修回日期:  2014-12-09
  • 刊出日期:  2015-03-18

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