Verification and modeling of the sea-surface bursting layer toward a new paradigm of wind-induced currents - strong-wind driven currents -

本研究的目的是为了弄清具有爆发层的强风海流的特征，提出一种新的强风海流模式--强风海流，并在此基础上建立了爆发层模式。将该模式与新近开发的海岸海流模式CCM相结合，再与波浪模式SWAN和气象模式MMS相结合，建立了强风驱动海流的计算模式，并通过与风洞试验和现场观测结果的对比，说明了该模式的适用性。指出了强风驱动流是一种新的风海流模式。本项目的主要内容概括如下：1）明确并模拟了具有爆发层的强风驱动流的垂向结构; 2）明确了表征强风驱动流的爆发层; 3）模拟了爆发层的湍流结构和风浪破碎器的扰动作用; 4）发展了考虑驱动和扰动作用的爆发层模型; 5）发展了可连续计算从近海到内湾的流场的沿岸海流模式CCM。发展了强风驱动流模式CCM，建立了强风驱动流模式CCM，并对该模式进行了初步的数值模拟将包含爆发层模式的CCM与MMS和SWAN相结合的风海流模型及其对真实的海面的适用性验证。

This research project was performed to make clear the characteristics of strong-wind driven currents with a bursting layer and present a new paradigm of wind-driven currents, that is, strong-wind driven currents.The bursting layer model was developed based on the measured results. By building this model into a newly developed coastal ocean current model CCM and then combining it with the wave model SWAN and the meteorological model MMS, a computational model of the strong-wind driven currents was established.Further, by showing its applicability through the comparison with the experimental results obtained in the wind tunnel experiment and the field observation results, it was presented that the strong-wind driven currents become a new paradigm of wind-induced currents. The primary contents of this project are summarized as follows :1) Clarification and modeling of vertical structure of strong-wind driven currents with the bursting layer.2) Clarification of the bursting layer characterizing the strong-wind driven currents.3) Modeling of turbulent flow structure of the bursting layer and disturbance action of wind wave breakers.4) Development of the bursting layer model taking into driving and disturbing actions.5) Development of the coastal ocean current model CCM that can continuously compute the current from offshore to inner bay.Development of the model of strong-wind driven currents where CCM including the bursting layer model is combined with MMS and SWAN and the verification of its applicability to real sea.