Physically Based Vision Simulation of Petrol Leak and Diffusion

The process of liquid spread and the process of evaporation and diffusion were combined together by the law of conservation of mass. The dynamic evaporation and diffusion model of petrol is proposed. The Stam method can used to simulate the gas diffusion, but it has the shortcoming of large numerical dissipation and it can´t perform the detail of diffusion process. To overcome the disadvantage of Stam method, an improved Stam method is proposed by introducing an error compensation factor. Based on the dynamic evaporation and diffusion, the leakage and diffusion processes are simulated real time by using improved Stam method.