Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
78539
Reference Type
Journal Article
Title
Deposition of inhaled particles in bifurcating airway models: I. Inspiratory deposition
Author(s)
Kim, CS; Iglesias, AJ
Year
1989
Is Peer Reviewed?
Yes
Journal
Journal of Aerosol Medicine
ISSN:
0894-2684
EISSN:
1557-9026
Volume
2
Page Numbers
1-14
Language
English
Abstract
Deposition pattern and efficiency of inhaled particles in bifurcating airways were studied experimentally by using Y-shaped single bifurcation tube models in conjunction with varying branching angles (θ = 15-90°), branching symmetry, and flow distribution pattern between two daughter branches. Monodispersed oil droplets (3, 5 and 7 μm dia.) tagged with uranine were used as test aerosols and sampling flow rate was maintained in the Reynolds number (Re) of 1132-3397. The model tubes were washed section by section with deionized water and the fluorescence content in the washed solution was used for determining deposition efficiency. Particle deposition occurred mainly near the bifurcation and increased with increasing Stokes number (StK). Deposition efficiency did not change with branching angle for θ = 15-45° but increased somewhat for the extreme branching angles of 60° and 90°. Branching asymmetry and flow distribution pattern did not affect the deposition efficiency within the range tested. From these results, a unified formula for deposition efficiency was derived as a single function of Stokes number and compared with theoretical predictions and previous experimental results.
Tags
•
ISA-PM (2009 Final Project Page)
2009 Final
•
ISA-PM (2019)
1st Draft
Chapter 4
Final ISA
Chapter 4
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity