Simulations of indoor airflow and particle dispersion and deposition by the lattice Boltzmann method using LES and RANS approaches

To simulate the particle dispersion and deposition in the room, particles with diameters of 10 nm-10 μm were investigated. For generating the instantaneous turbulence fluctuations for thek−ε model, the discrete random walk (DRW) method was used. Effects of SGS turbulence fluctuation on deposition rate of different size particles were also studied. It was shown that inclusion of the SGS turbulence fluctuations improves the model predictions. The simulated results for particle dispersion and deposition showed that the predictions of the present method are quite similar to the earlier finite volume method and are in good agreement with the experimental data.