3D Numerical simulation of Kuroshio-Induced wake near green island, TAIWAN
摘要：
In this paper, vortex shedding downstream of Green Island,due to passing of the Kuroshio was numerically studied using the three-dimensional Princeton Ocean Model. Temporal and spatial characteristics of the vortex street were analyzed at different tidal levels, wind and water depths. The model results were compared with in-situ measurements of the shipboard survey and MODIS (Moderate Resolution Imaging Spectroradiometer) satellite image datasets for vortex shedding. Numerical results suggest that the vortex spatial ratio (aspect ratio and dimensionless width), temporal scales (Strouhal number)and propagation speed of the vortices can stretch, twist, and interact in different water depths. A larger spatial ratio and a higher propagation speed for the island wake are found at the ebb tide and the flooding tide. Wind forcing had a pronounced effect on the characteristics of vortex shedding. Model simulations indicate that the aspect ratio of the vortex shedding is 3.64 and dimensionless width is 1.46 on the free surface under winds effect.
