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3021690 
Journal Article 
CFD simulation of airflow behavior and particle transport and deposition in different breathing conditions through the realistic model of human airways 
Rahimi-Gorji, M; Pourmehran, O; Gorji-Bandpy, M; Gorji, TB 
2015 
Yes 
Journal of Molecular Liquids
ISSN: 0167-7322 
209 
121-133 
WOS:000359958500017 
In this work, the airflow behavior and particle transport and deposition in different breathing conditions such as light breathing condition (15 L/min), normal breathing condition (30 L/min) and heavy breathing condition (60 L/min) are investigated. The realistic geometry data was reconstructed from CF-scan images of the human airways with 0.5 mm thickness of slices. The CT-scan images (DICOM files) are imported in the 3D-DOCTOR software and all slices were segmented. Then, the output has been imported in CATIA-V5 software. Finally, face, volume, mesh and extension tubes at inlet and outlets were created and then imported into ANSYS FLUENT 15. The Lagrangian appreach is used to evaluating the transport and deposition of inhaled micro-particles. The presented results showed that for d(p) = 5 mu m and 10 mu m, when flow rate = 30 L/min and for d(p) = 1 mu m, when flow rate = 15 L/min, the particle deposition fraction have maximum amount. For flow rate = 15 L/min and = 30 L/min, the maximum deposition occurs in the zone number 1 and for flow rate = 60 L/min occurs in the zone number 4. Also, the maximum pressure distribution happens when flow rate = 60 L/min which would be acceptable. According to the results, the particles tended to go to the right branch and the minimum number of particles crossed the zone numbers 6 and 11. (C) 2015 Elsevier B.V. All rights reserved. 
Airflow behavior; Particle deposition; Breathing conditions; Realistic geometry; CFD simulation