基于流体力学方程的二维烟雾模拟

介绍了一种基于流体力学方程并采取欧拉法实时模拟二维真实感烟雾的算法.为了获得视觉真实感,烟雾流体场的物理模型是根据Navier-Stokes方程定义;采取欧拉法将烟雾流体场划分为二维网格空间,并将烟雾速度场和浓度场分布定义于每个网格中心点;最后,通过双线性插值获得整幅图象中每个象素的烟雾浓度.试验证明该算法能实时高效地模拟具有真实感的二维烟雾效果.

Fluid Dynamics Based 2D Smoke Simulation

This paper presents a real time 2D smoke simulation algorithm based on fluid dynamics and Eulerian method. By using the Navier - Stokes equation, we define the smoke model to achieve a realistic effect. According to Eulerian method, the smoke fluid field is modeled on a square grid and we represent the distribution of smoke velocity and density fields at the center of each grid cell. Finally, the amount of density that every pixel carries is obtained by bilinear interpolation. Experiment results show that the algorithm is simple and effective to achieve photorealistic 2D smoke simulation in real time.