Nonlinear Water Wave Dynamics and Dispersion in Periodic Flows or Porous Media

周期性流或多孔介质中的非线性水波动力学和色散

• 批准号: 9115689
• 负责人: Chiang Mei
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-03-15 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115689&HistoricalAwards=false
• 关键词: Nonlinear; Water; Wave; Dynamics; Dispersion

Using a combination of mathematical analysis and numerical calculations, a study will be conducted of particle transport in surface wave induced oscillatory boundary layers over a sediment bed. An existing theory of homogenization will be extended and applied to this problem. The theory deals with physical phenomena involving several widely different scales. In this case, two very different scales are the flow forcing length and the suspended particle layer thickness. Dispersion coefficients and dispersion patterns will be determined, with forcing from both waves and tidal action. The research will have impact on the more reliable prediction of coastal sediment transport, relevant to beach protection and bay and harbor silting.

采用数学分析和数值计算相结合的方法，对沉积物床面波激振边界层中的颗粒输运进行了研究。现有的齐次化理论将被推广并应用于这个问题。该理论涉及几个大不相同的尺度的物理现象。在这种情况下，两个非常不同的尺度是流动强迫长度和悬浮颗粒层厚度。在波浪和潮汐作用的强迫下，将确定弥散系数和弥散模式。这项研究将对与海滩保护和海湾和港口淤积相关的海岸泥沙输移的更可靠预测产生影响。