Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 52 4 2018 09 11 Numerical Investigation of Flow Field around a Mannequin Model with Airway System in an Air Conditioned Room Numerical Investigation of Flow Field around a Mannequin Model with Airway System in an Air Conditioned Room 955 970 3069 10.22060/mej.2018.14349.5851 FA Mehrdad Azhdari mechanical engineering department,faculty of engineering,Islamic Azad University,Shiraz branch,Shiraz,Iran Mohammad Mehdi Tavakol Department of Mechanical Engineering Shiraz Branch IAU Iran Journal Article 2018 05 06 In this study, air flow around a mannequin equipped with a respiratory system at the center of ventilated room was studied numerically. In the first mode the air conditioner dampers were installed on the front wall and in the second modes they were installed on the right side wall. The inhalation rates of 15, 20 and 30 lit/min were simulated from the nostril inlet to the end of trachea. Flow field including the region around mannequin and airway, integrally, was evaluated by solving  the Navier-Stokes and continuity equations in steady state condition by means of k-ω-SST transition turbulence model in the Ansys-Fluent software. Pressure distribution, turbulence intensity, shear stress and streamlines were evaluated inside the airway passage. Furthermore, the velocity distribution and streamlines near the mannequin face for two ventilation modes were analyzed. According to the results for the turbulence intensity distribution the turbulent flow was observed inside the respiratory system for all of the breathing rates and location of the air condition dampers did not affect the turbulence intensity distribution inside the respiratory system. In addition, in the second mode, the lower air velocity was obtained around the mannequin face and better comfort condition inside the room was maintained. In this study, air flow around a mannequin equipped with a respiratory system at the center of ventilated room was studied numerically. In the first mode the air conditioner dampers were installed on the front wall and in the second modes they were installed on the right side wall. The inhalation rates of 15, 20 and 30 lit/min were simulated from the nostril inlet to the end of trachea. Flow field including the region around mannequin and airway, integrally, was evaluated by solving  the Navier-Stokes and continuity equations in steady state condition by means of k-ω-SST transition turbulence model in the Ansys-Fluent software. Pressure distribution, turbulence intensity, shear stress and streamlines were evaluated inside the airway passage. Furthermore, the velocity distribution and streamlines near the mannequin face for two ventilation modes were analyzed. According to the results for the turbulence intensity distribution the turbulent flow was observed inside the respiratory system for all of the breathing rates and location of the air condition dampers did not affect the turbulence intensity distribution inside the respiratory system. In addition, in the second mode, the lower air velocity was obtained around the mannequin face and better comfort condition inside the room was maintained. https://mej.aut.ac.ir/article_3069_f9eadcda144cd0778aa0d7ab6e00cf51.pdf