Overview of particle transport and deposition in flows in environmental and industrial applications was presented. Aerosol transport including particle deposition, removal and re-entrainment in turbulent flows were discussed. The numerical simulation airflow through the Reynolds averaged Navier-Stokes equation was described. The approximate stochastic models for simulation of instantaneous flow were discussed. The Lagrangian particle equation of motion was presented. It was shown that the particle deposition and removal processes in turbulent flows are strongly affected by the near wall flow structures. Wind tunnel studies of particle transport and deposition were also discussed. Examples of computational modeling of gas-solid flows in indoor and out door air were described. It was shown that computational modeling was an efficient tool for studying alternative scenarios. A simulation procedure for pollutant transport through human upper airways was discussed and sample results were presented.

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