Recently, CG images are being used everywhere, and the importance of rendering the natural world is increasing. Realistic images of natural objects based on physical laws, rather than focusing on appearance, are required. There are various natural objects such as clouds, water, topography, atmosphere, and dust, but most of them are a collection of particles from a microscopic point of view. This paper describes a drawing method that takes into account the dynamic changes in the shape of materials composed of particles and optical effects (light scattering). Water and clouds change dynamically as fluids, and they are seen by the observer through the scattering and attenuation of light particles. We will introduce our research on interactive rendering of such phenomena by high-speed calculation of CFD (Computational Fluid Dynamics) and optical effects (scattered light) using GPU (Graphics Processing Unit).

　This presentation will explain the impact of wikis on academic research and show how to use wikis as a database.

High-speed cameras have come a long way in the past five years, easily capturing 7,500 frames per second with a resolution of 1 million pixels. They are now widely used not only to visualize various phenomena in fluids, but also as a quantitative measurement tool. By dispersing tracer particles in the fluid and using a high-speed pulsed laser in combination with a high-speed camera to process the images, it has become easy to measure the velocity distribution in the fluid at multiple points simultaneously (a measurement method called PIV). We can easily obtain information that 10 years ago would have required the use of 10,000 hot wire anemometers (not feasible at all). This has resulted in breakthroughs in fluid and thermal engineering.