本實驗研究孤立波在波浪水槽傳遞，而在矩形結構物後方產生漩渦之情形。在本文中，結構物的寬深比w/d= 0.2。結構物安裝在水槽底部時水深為18公分，結構物安裝在水中央時水深為14公分，流場進行了粒子示踪技術。本試驗顯明當海嘯襲擊屏障物時，將有漩渦形成於結構物的背後，且隨後二次漩渦將形成在接近底部及其附近的自由液面。漩渦彼此相互作用，相互混合後更合併一體。為了更深入地探究這現象，研究者使用能以PIV展示速度變化的水槽，以表現漩渦的平均速度場和渦場，再進行定性和深入討論。

This study was about solitary wave which resulted vortex behind the rectangular structure when it passed in the flume. The aspect ratio (w/d) of two structures was 0.2. When still water depth was 18 cm, the structure was installed in the middle of the water. When still water depth was 14 cm, the structure was installed in the bottom. Furthemore, the flow field was observed by a particle tracing technique. This experimant shows that a vortex would come out behind the obstacles when a tsunami hit the barrier. Also, the second vortex would show up near the bottom and the surface. Those vortexes afterwards would interact with each other, mixed and merged together. Resercher adopted the water tank with PIV which can reveal the speed variations to survey these phenomena more deeply, and then investigated and qualitative the mean velocity fields and the vorticity fields of the evolution of vortex.

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