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http://dx.doi.org/10.3795/KSME-B.2006.30.11.1051

The PIV Measurements on the Respiratory Gas Flow in the Human Airway  

Kim, Sung-Kyun (건국대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.30, no.11, 2006 , pp. 1051-1056 More about this Journal
Abstract
The mean and RMS velocity field of the respiratory gas flow in the human airway was studied experimentally by particle image velocimetry (PIV). Some researchers investigated the airflow for the mouth breathing case both experimentally and numerically. But it is very rare to investigate the airflow of nose breathing in a whole airway due to its geometric complexity. We established the procedure to create a transparent rectangular box containing a model of the human airway for PIV measurement by combination of the RP and the curing of clear silicone. We extend this to make a whole airway including nasal cavities, larynx, trachea, and 2 generations of bronchi. The CBC algorithm with window offset (64 $\times$ 64 to 32 $\times$ 32) is used for vector searching in PIV analysis. The phase averaged mean and RMS velocity distributions in Sagittal and coronal planes are obtained for 7 phases in a respiratory period. Some physiologic conjectures are obtained. The main stream went through the backside of larynx and trachea in inspiration and the frontal side in expiration. There exist vortical motions in inspiration, but no prominent one in expiration.
Keywords
Bio-Fluid Mechanics; Human Airway; Tomographic PIV; Rapid Prototyping (RP); Computed Tomogram (CT);
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Times Cited By KSCI : 2  (Citation Analysis)
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