Using Holography and Particle Image Velocimetry to Study Particle Deposition, Re-suspension and Agglomeration

2016 ◽  
pp. 37-96
Author(s):  
René van Hout
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Deposition ◽  
Particle Image ◽  
Image Velocimetry

Flow Field Analysis in Expanding Healthy and Emphysematous Alveolar Models Using Particle Image Velocimetry

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
Jessica M. Oakes ◽  
Steven Day ◽  
Steven J. Weinstein ◽  
Risa J. Robinson
Keyword(s):  
Particle Image Velocimetry ◽  
Aerosol Particle ◽  
Particle Deposition ◽  
Particle Image ◽  
Flow Behavior ◽  
Three Dimensional ◽  
Field Analysis ◽  
Brownian Diffusion ◽  
Alveolar Wall ◽  
Image Velocimetry

Particulates that deposit in the acinus region of the lung have the potential to migrate through the alveolar wall and into the blood stream. However, the fluid mechanics governing particle transport to the alveolar wall are not well understood. Many physiological conditions are suspected to influence particle deposition including morphometry of the acinus, expansion and contraction of the alveolar walls, lung heterogeneities, and breathing patterns. Some studies suggest that the recirculation zones trap aerosol particles and enhance particle deposition by increasing their residence time in the region. However, particle trapping could also hinder aerosol particle deposition by moving the aerosol particle further from the wall. Studies that suggest such flow behavior have not been completed on realistic, nonsymmetric, three-dimensional, expanding alveolated geometry using realistic breathing curves. Furthermore, little attention has been paid to emphysemic geometries and how pathophysiological alterations effect deposition. In this study, fluid flow was examined in three-dimensional, expanding, healthy, and emphysemic alveolar sac model geometries using particle image velocimetry under realistic breathing conditions. Penetration depth of the tidal air was determined from the experimental fluid pathlines. Aerosol particle deposition was estimated by simple superposition of Brownian diffusion and sedimentation on the convected particle displacement for particles diameters of 100–750 nm. This study (1) confirmed that recirculation does not exist in the most distal alveolar regions of the lung under normal breathing conditions, (2) concluded that air entering the alveolar sac is convected closer to the alveolar wall in healthy compared with emphysematous lungs, and (3) demonstrated that particle deposition is smaller in emphysematous compared with healthy lungs.

CHARACTERIZATION OF FIRE SPRINKLER SPRAYS USING PARTICLE IMAGE VELOCIMETRY

2005 ◽  
Vol 15 (3) ◽  
pp. 341-362 ◽  
Author(s):  
David T. Sheppard ◽  
Richard M. Lueptow
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Image Velocimetry ◽  
Fire Sprinkler

Multiwavelets and Particle Image Velocimetry methods

1999 ◽  
Author(s):  
Andrew Kurdila ◽  
Othon Rediniotis ◽  
Thomas Strganac ◽  
Jeonghwan Ko
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Image Velocimetry
Sign in / Sign up

Export Citation Format

Share Document