Coastal Dynamics Characterized by Multiple Scales

项目编号：CTS-9634120 PI: Mei这是一项关于海岸工程领域感兴趣的一系列问题的研究。所研究的问题的共同特点是它们有几个不同的长度或时间尺度。渐近分析和数值分析以及实验研究正在被用于研究潜在的物理。研究的问题有：a)表面波对极细沉积物再悬浮和输运的影响；b)波浪诱导沙纹和沙坝的形成；c)窄带状短波诱导的长周期港湾振荡；d)被困在垂直圆柱体阵列中的波的次谐波共振。浅水水体细沙侵蚀与输运问题是一个具有严重环境影响的重要问题。波浪在圆柱阵列中的长周期振荡和次谐波共振的研究对港口设施的设计具有重要意义。所有四个主题都有实验和理论组成部分。

ABSTRACT Proposal Number: CTS-9634120 PI: Mei This is a study of a range of problems that are of interest to the field of coastal engineering. The common feature of the problems under study is that they have several contrasting length or time scales. Asymptotic and numerical analysis as well as experimental investigations are being used to investigate the underlying physics. The problems under investigation are: a) Effects of surface waves on the resuspension and transport of very fine sediments, b) Wave induced formation of sand ripples and bars, c) Long-period harbor oscillations induced by narrow banded short waves, and d) Subharmonic resonance of waves trapped in an array of vertical cylinders. The subject of fine sediment erosion and transportation in shallow water bodies is an important problem with serious environmental implications. The study of long period oscillations and subharmonic resonance of waves in an array of cylinders are of importance to the design of harbor facilities. All four topics have an experimental and a theoretical component.