Transport of Sub-micron Aerosols in Bifurcations
Name
MEBCS031.pdf
Size
378.97 KB
Format
Adobe PDF
Checksum (MD5)
f0ec0716e7e0633a4dce31d5258487a4
Author(s)
Leong, Fong Yew
Smith, Kenneth A.
Wang, Chi-Hwa
Date Issued
January 2005
Series/Report no.
Molecular Engineering of Biological and Chemical Systems (MEBCS);
Abstract
The convective-diffusive transport of sub-micron aerosols in an oscillatory laminar flow within a 2-D single bifurcation is studied, using order-of-magnitude analysis and numerical simulation using a commercial software (FEMLAB®). Based on the similarity between momentum and mass transfer equations, various transient mass transport regimes are classified and scaled according to Strouhal and beta numbers. Results show that the mass transfer rate is highest at the carinal ridge and there is a phase-shift in diffusive transport time if the beta number is greater than one. It is also shown that diffusive mass transfer becomes independent of the oscillating outer flow if the Strouhal number is greater than one.
Subjects
aerosol
convective-diffusive
lung
sub-micron
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