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The effects of leaf area density variation on the particle collection efficiency in the size range of ultrafine particles (UFP).

Publication ,  Journal Article
Huang, C-W; Lin, M-Y; Khlystov, A; Katul, G
Published in: Environmental science & technology
October 2013

Carbonaceous particles were generated during a "sooting burn" experiment to explore how heterogeneity in horizontal leaf area density (LAD) within the canopy impacts the ultrafine particle (UFP) collection efficiency at the branch-scale. To address this goal, wind tunnel experiments and a particle-size resolving model, which couples the turbulent flow field within the vegetated volume and the collection efficiency, were presented. Three scenarios were examined in a wind-tunnel packed with Juniperus chinensis branches: An LAD that was uniformly distributed, linearly increasing and linearly decreasing along the longitudinal or mean wind direction. The concentration measurements were conducted at multiple locations within the vegetated volume to evaluate the performance of the proposed model needed in discerning the role of LAD heterogeneity on UFP collection. Differences not exceeding 20% were found between modeled and measured concentration for all particle sizes across a wide range of wind speeds. The overall particle collection efficiency was found to be primarily governed by the spatially integrated LAD when differences in aerodynamic attributes (e.g., foliage drag) were accounted for. When combined with earlier studies, the results suggest that one parameter linking the laminar boundary layer conductance to the Schmidt number depends on particle size.

Duke Scholars

Published In

Environmental science & technology

DOI

EISSN

1520-5851

ISSN

0013-936X

Publication Date

October 2013

Volume

47

Issue

20

Start / End Page

11607 / 11615

Related Subject Headings

  • Wind
  • Plant Leaves
  • Particulate Matter
  • Particle Size
  • Juniperus
  • Environmental Sciences
 

Citation

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Huang, C.-W., Lin, M.-Y., Khlystov, A., & Katul, G. (2013). The effects of leaf area density variation on the particle collection efficiency in the size range of ultrafine particles (UFP). Environmental Science & Technology, 47(20), 11607–11615. https://doi.org/10.1021/es4013849
Huang, Cheng-Wei, Ming-Yeng Lin, Andrey Khlystov, and Gabriel Katul. “The effects of leaf area density variation on the particle collection efficiency in the size range of ultrafine particles (UFP).Environmental Science & Technology 47, no. 20 (October 2013): 11607–15. https://doi.org/10.1021/es4013849.
Huang C-W, Lin M-Y, Khlystov A, Katul G. The effects of leaf area density variation on the particle collection efficiency in the size range of ultrafine particles (UFP). Environmental science & technology. 2013 Oct;47(20):11607–15.
Huang, Cheng-Wei, et al. “The effects of leaf area density variation on the particle collection efficiency in the size range of ultrafine particles (UFP).Environmental Science & Technology, vol. 47, no. 20, Oct. 2013, pp. 11607–15. Epmc, doi:10.1021/es4013849.
Huang C-W, Lin M-Y, Khlystov A, Katul G. The effects of leaf area density variation on the particle collection efficiency in the size range of ultrafine particles (UFP). Environmental science & technology. 2013 Oct;47(20):11607–11615.
Journal cover image

Published In

Environmental science & technology

DOI

EISSN

1520-5851

ISSN

0013-936X

Publication Date

October 2013

Volume

47

Issue

20

Start / End Page

11607 / 11615

Related Subject Headings

  • Wind
  • Plant Leaves
  • Particulate Matter
  • Particle Size
  • Juniperus
  • Environmental Sciences