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波浪扰动下河口幂律异重流的动力场分布特性

徐海珏 吴金森 白玉川

徐海珏, 吴金森, 白玉川. 波浪扰动下河口幂律异重流的动力场分布特性[J]. 力学学报, 2019, 51(6): 1699-1711. doi: 10.6052/0459-1879-19-073
引用本文: 徐海珏, 吴金森, 白玉川. 波浪扰动下河口幂律异重流的动力场分布特性[J]. 力学学报, 2019, 51(6): 1699-1711. doi: 10.6052/0459-1879-19-073
Xu Haijue, Wu Jinsen, Bai Yuchuan. DYNAMIC DISTRIBUTION OF POWER-LAW DENSITY CURRENT IN ESTUARY UNDER WAVE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(6): 1699-1711. doi: 10.6052/0459-1879-19-073
Citation: Xu Haijue, Wu Jinsen, Bai Yuchuan. DYNAMIC DISTRIBUTION OF POWER-LAW DENSITY CURRENT IN ESTUARY UNDER WAVE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(6): 1699-1711. doi: 10.6052/0459-1879-19-073

波浪扰动下河口幂律异重流的动力场分布特性

doi: 10.6052/0459-1879-19-073
基金项目: 1) 科技部重点研发计划(2018YFC0407505);国家自然科学基金资助项目(41576093)
详细信息
    通讯作者:

    吴金森

    吴金森,白玉川

  • 中图分类号: TV148

DYNAMIC DISTRIBUTION OF POWER-LAW DENSITY CURRENT IN ESTUARY UNDER WAVE

  • 摘要: 河口底层浮泥异重流的运动特性对于河口维持以及港口航道泥沙淤积过程具有重要的作用, 是海岸学科研究的关键内容, 也是热点内容之一. 本文首先综述了河口泥沙异重流研究的重要意义, 分析并总结了各家异重流理论模型的不同点和适应条件; 其次, 根据本文研究问题的实际需要, 构建了波浪与底泥相互作用的双层流体理论分析模式, 将上层流体简化为常见的牛顿体, 而将下层流体的流变关系设置为幂律函数, 研究了波浪作用下河口底部幂律异重流的流场特性. 这些特性包括:波浪速度场、底泥运动的流速场、不同密度影响下的压力场以及异重流泥面波与表面 波的波幅比等, 分析了泥层密度、波动圆频率以及底泥幂律指数对流场及界面波的影响. 研究发现, 在波浪扰动下, 两层流体交界处速度分量连续, 压强出现突变. 在下部泥层中, 水平速度幅值曲线存在极大值. 随着波动圆频率增加以及泥层密度与流动指数的减小, 界面处上下压强差值呈现增大的趋势. 本模型与实测波幅比的数据进行对比结果证实了模型的合理性.

     

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  • 被引次数: 0
出版历程
  • 收稿日期:  2019-03-27
  • 刊出日期:  2019-11-18

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