Many researches have discussed a drop impingement behavior onto liquid surface under the condition with the same kind of fluid for both of drop and liquid free surface. The behaviors of free surface and a bubble entrainment in a drop impact are visualized using a high-speed video camera. The fluids for free surface and a drop are used same and different kind of fluids in the drop impact test. The experimental condition is changed by using several kind of fluids and various drop releasing height. The bubble entrainment condition using different fluids is not equal to that of same fluid though the results with same fluid correspond to the previous studies. The shape of free surface vicinity on the drop impact with bubble entrainment correspond to the dropping condition. The shape near the free surface is recognized by using non-dimensional number WeFr1/4.
Numerical models for tsunami phenomena have been improved to estimate various tsunami damages. However, they are not sufficiently utilized for tsunami disaster reduction measures, because the computed results are getting more complicated. It is necessary to visualize the simulated tsunami disaster scenarios. In this research, a method is developed to visualize the complicated tsunami risks by using Marker Vision based Augmented Reality. The multiple markers are connected with the computed tsunami animation, a pause function of animation, and a detailed urban structure model which consists of the ground, the sea, roads and buildings. Their respective computer graphics corresponding the markers are projected in the real world by using a camera-embedded eyeglass. And a tsunami numerical modeling was conducted to make the tsunami animation. It assumed a huge earthquake of magnitude 9.1 in the Nankai Trough and simulated its tsunami inundating in Kobe City. The proposed method can be applied for many measures such as tsunami hazard map and Disaster Imagination Game.
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