Transport processes in inland and coastal waters

内陆和沿海沃茨的污染物和泥沙输运动力学具有高度的各向异性，并有二维化的趋势。自Kraichnan（1967）关于二维湍流的开创性工作以来，二维水平湍流和不同长度尺度的小尺度三维湍流之间的能量级联、级联的反向或两者的组合是人们非常感兴趣的课题。不仅需要实验室数据来支持理论工作，还需要模型的开发。地球自转是大规模交换的决定性因素。湍流引起的界面小尺度混合取决于密度/重力分层的稳定性/不稳定性。申请人、他的研究伙伴和研究生已经进行了研究，以研究这些时间和长度尺度非常不同的2D和3D运输过程。考虑了风、浪、流对过程的影响。沉积物的侵蚀和沉积是研究的一部分。研究的重点是建模的基本原理，以及通过实验室和现场研究验证模型。在过去六年的研究已经导致（一）出版1本书，1本书的章节，1书评，1社论，4 M.工程论文，3博士。论文和43篇论文，（二）仪器和数据采集技术的发展速度，温度，盐度和示踪剂浓度测量，以及（三）湍流模型模拟的数值方法的实施。未来的研究将继续在基本面上进行。研究的重点将放在小规模过程的研究上。目前，正在建造一条新的航道，以便按计划研究波浪和水流对海岸的侵蚀。正在进行的大规模交换的宽通道实验将扩大到包括非常大的对流弗劳德数的情况。将继续用实验数据验证模拟模型。数值工作将包括实施TVD计划控制的数值振荡，并进一步发展一个强大的数值方法使用块作为计算元素。

The dynamics of pollutant and sediment transports in inland and coastal waters are highly anisotropic with a tendency to two-dimensionality. The energy cascade, the reverse of the cascade, or a combination of both, between the 2D horizontal turbulence and small-scale 3D turbulence of distinct length scales are subjects of much interest, since the seminal work of Kraichnan (1967) on 2D turbulence. Laboratory data are needed to support not only the theoretical works but also the development of models. The Earth's rotation is a deciding factor in the large-scale exchanges. The small scale mixings across interfaces by turbulence are dependent on stability/instability of the density/gravity stratification. Research has been conducted by the applicant, his research associates and graduate students to study these 2D and 3D transport processes of very different time and length scales. Wind, wave and current effects on the processes are considered. The erosion and deposition of sediments are part of the study. The focus of the research has been on the fundamentals of modeling, and the verification of the models through laboratory and field studies. The research over the last six years has led to (i) the publication of 1 book, 1 book chapter, 1 book review, 1 editorial, 4 M.Eng. theses, 3 Ph.D. thesis and 43 papers, (ii) the development of instrumentation and data acquisition technique for velocity, temperature, salinity and tracer-concentration measurements, and (iii) the implementation of numerical methods for model simulations of turbulent flow. Future research will continue on the fundamentals. Greater emphasis of the research will be placed in the studying of the small-scale processes. Currently, a new channel is under construction for the planned study of the coastal erosion by waves and currents. The ongoing experiments in the wide channel for the large-scale exchanges will broaden to include cases of very large convective Froude number. The validation of the simulation models by experimental data will continue. The numerical effort will include the implementation of TVD schemes for the control of numerical oscillations, and the further development of a robust numerical method using the blocks as the computational elements.