Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The Influence of Air Flow Velocity and Particle Size on the Collection Efficiency of Passive Electrostatic Aerosol Samplers
KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0002-4171-5091
KTH, School of Electrical Engineering and Computer Science (EECS), Micro and Nanosystems.ORCID iD: 0000-0001-6915-257X
KTH, School of Electrical Engineering and Computer Science (EECS), Micro and Nanosystems.
KTH, School of Electrical Engineering and Computer Science (EECS), Micro and Nanosystems.ORCID iD: 0000-0001-8248-6670
Show others and affiliations
2019 (English)In: Aerosol and Air Quality Research, ISSN 1680-8584, E-ISSN 2071-1409, Vol. 19, no 2, p. 192-203Article in journal (Refereed) Published
Abstract [en]

Electrostatic sampling is a promising method for the collection of bioaerosol particles. Although the underlying physics responsible for particle collection are well understood, the collection efficiency of simple passive electrostatic samplers is difficult to predict. Under these conditions, the collection efficiency becomes very sensitive to ambient air current and particle size, especially for submicron particles relevant for airborne virus transmission. In this paper, we compare two electrostatic aerosol sampler designs, a commercial product consisting of a flat collector plate located in the same plane as the charging needles and an axisymmetric design sampling directly to a liquid droplet. The aerosol particle collection efficiency of the samplers is investigated for particle size ranging from 0.25 to 2 µm while the air flow velocity surrounding the samplers is varied from 0.3 to 1 m s–1. For the planar design, at all ambient flow velocities, the submicron fraction of the particles captured originates in streamlines up to a maximum of 75 mm above the surface of the device collector, which greatly limits the volume of air being effectively sampled. The axisymmetric design features a non-monotonic capture efficiency as a function of particle size, with a minimum between 0.4 and 0.8 µm. The flow field in the inter-electrode region, captured using particle image velocimetry (PIV) reveals the presence of strong recirculation zones that can be responsible for the increased collection efficiency for very small particles.

Place, publisher, year, edition, pages
2019. Vol. 19, no 2, p. 192-203
National Category
Other Engineering and Technologies
Identifiers
URN: urn:nbn:se:kth:diva-243837DOI: 10.4209/aaqr.2018.06.0211ISI: 000457195200001Scopus ID: 2-s2.0-85063957081OAI: oai:DiVA.org:kth-243837DiVA, id: diva2:1286458
Projects
NOROSENSOR
Note

QC 20190213

Available from: 2019-02-06 Created: 2019-02-06 Last updated: 2019-05-16Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Imani Jajarmi, RaminLadhani, Lailavan der Wijngaart, Wouter

Search in DiVA

By author/editor
Imani Jajarmi, RaminLadhani, LailaPardon, Gasparvan der Wijngaart, Wouter
By organisation
MechanicsMicro and Nanosystems
In the same journal
Aerosol and Air Quality Research
Other Engineering and Technologies

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 83 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf