Transport and deposition of particles near a building model

Particle transport, dispersion and deposition near a building model were studied. The stress transport model of FLUENT™ code was used for simulating the mean airflow. The instantaneous turbulence fluctuating velocity was simulated by a Gaussian-filtered white-noise model. A Lagrangian particle tracking computational procedure was developed and was used for simulating particle transport and deposition in the vicinity of the building model. The computational model accounted for the drag and lift forces acting on the particle, as well as the effect of Brownian force, in addition to the gravitational sedimentation effects. For particles in the size range of 0.01–10 μm, the corresponding deposition rates on various surfaces of the building model were evaluated.