Human-induced particle re-suspension in a room

Roshan C. Oberoi, Jung-il Choi, Jack R. Edwards, Jacky A. Rosati, Jonathan Thornburg, Charles E. Rodes

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A large-eddy simulation/immersed boundary method for particulate flows in an Eulerian framework is utilized to investigate short-term particle re-suspension due to human motion. The simulations involve a human walking through a room, stopping, and then walking in place, causing particles to be re-suspended from a carpet. The carpet layer is modeled as the porous medium and a classical adhesive force model is applied to model the resistance of the carpet-bound material to hydrodynamic forcing. The effects of parameters such as the foot penetration depth and adhesive force coefficient on mass re-suspended during the foot stamping events are examined. Simulations of particulate re-suspension experiments conducted in a room within a U.S. Environmental Protection Agency test house are also described. The simulations vary the type of human motion (stamping in place versus stamping in place with rotation). The results indicate that significant amounts of particulate material are re-suspended from the carpet layer due to the impingement of the feet during the motion event. The net mass re-suspended for human motion with rotation is two times greater than that for the motion without rotation, while the mass of re-suspended small particles is slightly greater than that of large particles. The re-suspension rates are estimated based on several time scales, and the predicted total particle number concentrations at several locations in the room show good agreement with experimental data. The present CFD model can be utilized to predict particle re-suspension rates as induced by human motion, but further work in modeling the fine-scale details of the re-suspension process is needed.

Original languageEnglish
Pages (from-to)216-229
Number of pages14
JournalAerosol Science and Technology
Volume44
Issue number3
DOIs
Publication statusPublished - 2010 Mar 1

Fingerprint

Stamping
resuspension
Suspensions
Adhesives
Environmental Protection Agency
Large eddy simulation
walking
Porous materials
Computational fluid dynamics
Hydrodynamics
simulation
large eddy simulation
porous medium
particle
penetration
Experiments
hydrodynamics
timescale
modeling
experiment

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Materials Science(all)
  • Pollution

Cite this

Oberoi, R. C., Choi, J., Edwards, J. R., Rosati, J. A., Thornburg, J., & Rodes, C. E. (2010). Human-induced particle re-suspension in a room. Aerosol Science and Technology, 44(3), 216-229. https://doi.org/10.1080/02786820903530852
Oberoi, Roshan C. ; Choi, Jung-il ; Edwards, Jack R. ; Rosati, Jacky A. ; Thornburg, Jonathan ; Rodes, Charles E. / Human-induced particle re-suspension in a room. In: Aerosol Science and Technology. 2010 ; Vol. 44, No. 3. pp. 216-229.
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Oberoi, RC, Choi, J, Edwards, JR, Rosati, JA, Thornburg, J & Rodes, CE 2010, 'Human-induced particle re-suspension in a room', Aerosol Science and Technology, vol. 44, no. 3, pp. 216-229. https://doi.org/10.1080/02786820903530852

Human-induced particle re-suspension in a room. / Oberoi, Roshan C.; Choi, Jung-il; Edwards, Jack R.; Rosati, Jacky A.; Thornburg, Jonathan; Rodes, Charles E.

In: Aerosol Science and Technology, Vol. 44, No. 3, 01.03.2010, p. 216-229.

Research output: Contribution to journalArticle

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Oberoi RC, Choi J, Edwards JR, Rosati JA, Thornburg J, Rodes CE. Human-induced particle re-suspension in a room. Aerosol Science and Technology. 2010 Mar 1;44(3):216-229. https://doi.org/10.1080/02786820903530852