NDLI: Fibrous and Spherical Particle Transport and Deposition in the Human Nasal Airway: A Computational Fluid Dynamics Model

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Kevin, T. Shanley Ahmadi, Goodarz Philip, K. Hopke Cheng, Yung-Sung
Copyright Year	2009
Abstract	As the interface between the human respiratory system and the environment, the nose plays many vital roles. Not the least of which is filter. Resulting from numerous natural and anthropogenic processes, particulate matter becomes airborne. Should particulate matter reach the lower portions of the respiratory tract, a host of maladies may occur. In an attempt to further understand the physics behind particulate matter transitioning from the environment into humans a computational model has been developed to predict the efficiency with which human noses can remove particles before they reach the lungs. To this end computational fluid dynamics and Lagrangian particle tracking simulations have been run to gather information on the deposition behavior of both fibrous and spherical particles. MRI data was collected from the left and right passages of a 181.6 cm, 120.2 kg, human male. The two passages were constructed into separate computational volumes consisting of approximately 950,000 unstructured tetrahedral cells each. A steady laminar flow model was used to simulate the inhalation portion of a human breathing cycle. Volumetric flow rates were varied to represent the full range of human nasal breathing. General agreement was shared quantitatively and qualitatively with previously published in vitro studies on other nasal models. Lagrangian particle tracking was performed for varying sizes of fibrous and spherical particles. Deposition efficiency was shown to increase with fiber aspect ratio, particle size, and flow rate. Anatomy was also identified as effecting deposition.
Sponsorship	Fluids Engineering Division
Starting Page	2139
Ending Page	2148
Page Count	10
File Format	PDF
ISBN	9780791843727
DOI	10.1115/FEDSM2009-78204
e-ISBN	9780791838556
Volume Number	Volume 1: Symposia, Parts A, B and C
Conference Proceedings	ASME 2009 Fluids Engineering Division Summer Meeting
Language	English
Publisher Date	2009-08-02
Publisher Place	Vail, Colorado, USA
Access Restriction	Subscribed
Subject Keyword	Cfd Human nose Lagrangian particle tracking Particle deposition efficiency Nasal breathing Fiber motion Computational fluid dynamics Particulate matter Fibers
Content Type	Text
Resource Type	Article

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