Investigation on the respiratory airflow in human airway by PIV

The creation of the accurate transparent flow passage is essential to analyze the flow inward a geometrically complex flow passage like human airway by PIV. We established the procedure to create a transparent box containing a model of the human airway for PIV measurements. A flow passage includes the whole human upper airway, nasal cavities, larynx, trachea, and 2 generations of bronchi. The phase averaged mean and RMS velocity distributions in sagittal and coronal planes are obtained for 7 phases in a respiratory period by tomographic PIV. Some physiologic conjectures are obtained. The main stream went through the backside of larynx and trachea in inspiration and the frontal side in expiration.

[1]  Anthony S. Wexler,et al.  Particle image velocimetry measurements in complex geometries , 2000 .

[2]  Seung-Kyu Chung,et al.  Digital particle image velocimetry studies of nasal airflow , 2008, Respiratory Physiology & Neurobiology.

[3]  Alberto M. Gambaruto,et al.  Nasal airflow: computational and experimental modelling , 2006 .

[4]  Lee.  Dynamic PIV Measurement of a High-Speed Flow Issuing from Vent-Holes of a Curtain-Type Airbag , .

[5]  Mesbah Uddin,et al.  The flow inside an idealised form of the human extra-thoracic airway , 2004 .

[6]  Sung Kyun Kim,et al.  The Experimental Research on Periodic Airflow in Human Nasal Cavity , 2005 .

[7]  Morten Christian Melaaen,et al.  Computational modelling of nasal aerodynamics , 2006 .

[8]  Chin-Hsiang Cheng,et al.  Experimental Study of the Effect of Transverse Oscillation on Convection Heat Transfer From a Circular Cylinder , 1997 .

[9]  Y. Cheng,et al.  Measurements of airway dimensions and calculation of mass transfer characteristics of the human oral passage. , 1997, Journal of biomechanical engineering.

[10]  S. K. Kim,et al.  An investigation on airflow in disordered nasal cavity and its corrected models by tomographic PIV , 2004 .

[11]  Denis J. Doorly,et al.  Airflow in the human nasal cavity , 2006 .

[12]  S. Shin,et al.  Nasal Airflow during Respiratory Cycle , 2006, American journal of rhinology.

[13]  Sung Kyun Kim.  An experimental study of developing and fully developed flows in a wavy channel by PIV , 2001 .

[14]  D. Hart,et al.  PIV error correction , 2000 .

[15]  Y. Sun,et al.  Effect of Sliding Friction on Contact Stresses for Multi-Layered Elastic Bodies With Rough Surfaces , 1997 .

[16]  Hiroyuki Hirahara,et al.  Experimental investigation of oscillatory air flow in a bronchial tube model with HFOV mode , 2006, J. Vis..

[17]  Sung-Kyun Kim.  Particle Image Velocimetry Measurements in Nasal Airflow , 2002 .

[18]  Markus Hess,et al.  Experimentelle Untersuchung der Strombahnen in der Nasenhaupthöhle des Menschen am Nasen-Modell , 1992 .

[19]  Clement Kleinstreuer,et al.  Flow structures and particle deposition patterns in double-bifurcation airway models. Part 2. Aerosol transport and deposition , 2001, Journal of Fluid Mechanics.

[20]  Y Liu,et al.  Modeling the bifurcating flow in an asymmetric human lung airway. , 2003, Journal of biomechanics.

[21]  Andrew Pollard,et al.  Experimental measurements and computational modeling of the flow field in an idealized human oropharynx , 2003 .

[22]  M. M. Mozell,et al.  The biophysics of nasal airflow. , 1989, Otolaryngologic clinics of North America.

[23]  Jeong Soo Kim,et al.  PIV measurements on the change of the three-dimensional wake structures by an air spoiler of a road vehicle , 2008, J. Vis..

[24]  Sung Kyun Kim,et al.  Investigation on airflows in abnormal nasal cavity with adenoid vegetation by particle image velocimetry , 2004 .