Coastal Dynamics Characterized by Multiple Scales

摘要 提案编号：CTS-9634120 PI：Mei 这是对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。 渐近和数值分析以及实验研究正在被用来调查的基本物理。 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）波浪引起的沙纹和沙坝的形成，c）窄带状短波引起的长周期港口振荡，以及d）垂直圆柱阵列中捕获的波浪的亚谐共振。 细颗粒泥沙在浅水水体中的侵蚀和输移是一个重要的环境问题。 波浪在圆柱群中的长周期振荡和亚谐共振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.