IMPROVEMENTS ON THE FAST FLUID DYNAMIC MODEL FOR INDOOR AIRFLOW SIMULATION
Wangda Zuo, Qingyan Chen
Recently, a Fast Fluid Dynamics (FFD) method was proposed for real-time airflow simulation in buildings. As an intermediate model between nodal models and Computational Fluid Dynamics (CFD), the FFD is fast and informative. This paper reports our efforts on improving the accuracy of FFD model. The linear interpolation in semi-Lagrangian solver for advection equation can cause significant numerical diffusion. To minimize numerical diffusion, we proposed a hybrid interpolation. Our simulation results show that the hybrid scheme can significantly improve the accuracy.
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