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Particle based Waterfall Simulation with Spray Cloud Emerging from Basin

One of the most challenging issues is to simulate and visualize physical phenomena such as thunder, aurora, avalanche and so forth. Among them, simulation of liquid behavior is difficult but most familiar to us. Then, there are many researches related to water; however, there are not so many studies on waterfall. Some researchers visualized waterfall behavior, which, however, was not based on physical simulations. Other papers on physics based simulations demonstrated part of waterfall instead of the whole behavior. Then, we have tried to visualize the whole behavior of waterfall with a physics based particle method. In order to simulate the whole behavior of waterfall, huge amount of particles are needed so that our model divides the whole of waterfall into three parts: water stream, splashing spray, and spray cloud. In the previous works, we have been able to visualize the whole behavior of waterfall, where water stream was translated to splashing spray that was also changed into spray cloud. Then, the previous method had splashing spray and spray cloud emerging from water stream, while real waterfalls have spray cloud that appears from the basin instead of water stream. Therefore, this paper proposes a model to generate spray cloud emerging from the basin instead of water stream.