POSTPROCESSOR OF PARTICLE METHOD FOR VISUAL EXPRESSION OF FALLING WATER

Abstract

In late years, the techniques of the CFD for the free-surface flow are developing rapidly. On the other hand, study of the computer graphics (CG) to express a complicated natural phenomenon is conducted actively, and the methods to get realistic CG of natural phenomena with fluid motion, such as a cloud, a flame and a current, have been proposed. The representative of these methods in CG is the particle system. In this study, the simple motion rule of particle in the particle system is improved by introducing the MPS (Moving Particle Semi-implicit) method, which is a solver of the Navier-Stokes equation, to combine the Lagrangian physical model of fluid with the Lagrangian tool of CG. Furthermore, the sub-particle scale expression of mists is described by the Monte Carlo simulation of the mist particles, based on the concept of the DDM (discrete droplet model). Finally the physical CG of a falling water is shown.