Abstract: This approach aims at improving the performance and reality of fire simulation in virtue of powerful ability of GPUPU. An emitter composed of yaw and pitch was designed to control the particle stream precisely. The formula of laminar flame was modified to outline the shape of turbulent fire. Besides, Lagrange interpolation was used to smooth and get the accurate fire skeleton around which particles move even when it becomes twist. In order to improve the performance,global memory was adopted to store particles to prevent the spending of binding texture memory repeatedly;parallelization of Lagrange interpolation and properties of particles update were realized of CUDA.All these measures contribute to reach a desirable real-time simulation speed and acquire an improvement of performance.

Key words: Particle system, GPU, Gcncral-purpose computation, Yaw, Pitch, Lagrangc interpolation, CUDA