抄録
The Smoothed Particle Method is applied to the gas dynamics in the astrophysical problems and the radiative transfer problem for the direct visualization of gas flows. The fluid is treated as an ensemble of spatially extended Lagrangian particles, which have density distribution of the Gaussian kernel. The Smoothed Particle Hydrodynamics (SPH) describes the motion of each particle in the Lagrangian approach and then calculates the physical quantities from the distribution of particles. Hence SPH is particularly suited for the simulation of highly distorted flow. The Smoothed Particle Rendering (SPR) integrates the ray equation through the opaque medium and calculates the contribution of scattered light. The opacity represents the density scalar and the emissivity is derived by the temperature field. The validity of SPR indicates the possibility to simulate the radiation hydrodynamics. We will show four SPH applications visualized by SPR.
