Abstract Number: 663 Working Group: Indoor Aerosols
Abstract In most of earlier works in the filed of micro particle deposition in the upper airway, the aerosols are injected uniformly at the inlet of nostril. In present work it is aimed to investigate the effect of facial effect on regional aerosol deposition in the nasal airway system. For this aim a 3-D computational model of the airway system is combined with a 3-D model of mannequin. The computational domain includes the regions around the mannequin and the inside of the airway system. The simulation was performed for the calm air condition. Firstly the flow filed for the inhalation of a specified air flow rate is obtained by solving the Navier Stokes equations. Then the particles are released form the boundaries around the mannequin head and their motion are evaluated using a Lagrangian approach for solving the equations for dynamics of particles. The regional aerosols deposition is evaluated for different parts of the human air way system and the results compared with those for separate modeling of the airway system. The results depict that the importance of facial effect on the local deposition of inhaled particles in the airway system.