CFD simulation of airflow behavior and particle transport and deposition in different breathing conditions through the realistic model of human airways

International Conference on Medical Physics

August 03-05, 2015 Birmingham, UK

M Gorji-Bandpy

Posters-Accepted Abstracts: J Nucl Med Radiat Ther

Abstract :

In this work, the airflow behavior and particle transport and deposition in different breathing conditions such as light breathing condition (i.e. 15 L/min), normal breathing condition (30 L/min) and finally the heavy breathing condition (i.e. 60 L/min) are investigated numerically. The realistic geometry data was reconstructed from CT-scan images of the human airways with 0.5 mm thickness of slices. The CT-scan images are imported in the 3D-DOCTOR 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 approach is used to evaluating the transport and deposition of inhaled micro-particles. The presented results showed that for dp=5 μm and 10 μm, when flow rate=30 L/min and for dp=1 μm, when flow rate=15 L/min, the particle deposition fraction has the 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.