01525nas a2200169   4500008004100000245011000041210006900151260002700220520091900247653000801166653000801174653002201182653002801204100001601232700001801248856008901266       2011                        eng d00aValidation of a Fast-Fluid-Dynamics Model for Predicting Distribution of Particles with Low Stokes Number0 aValidation of a FastFluidDynamics Model for Predicting Distribut  aAustin, Texasc06/20113 aTo design a healthy indoor environment, it is important to study airborne particle distribution indoors. As an intermediate model between multizone models and computational fluid dynamics (CFD), a fast fluid dynamics (FFD) model can be used to provide temporal and spatial information of particle dispersion in real time. This study evaluated the accuracy of the FFD for predicting transportation of particles with low Stokes number in a duct and in a room with mixed convection. The evaluation was to compare the numerical results calculated by the FFD with the corresponding experimental data and the results obtained by the CFD. The comparison showed that the FFD could capture major pattern of particle dispersion, which is missed in models with well-mixed assumptions. Although the FFD was less accurate than the CFD partially due to its simplification in numeric schemes, it was 53 times faster than the CFD.10acfd10affd10alow stokes number10aparticle transportation1 aZuo, Wangda1 aChen, Qingyan  uhttps://simulationresearch.lbl.gov/publications/validation-fast-fluid-dynamics-model