Resuspension of particulates from surfaces to turbulent flows—Review and analysis

Ziskind, G.; Fichman, M.; Gutfinger, C.

doi:10.1016/0021-8502(94)00139-p

Cited by 184 publications

(87 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(Reeks and Hall 2001;Ibrahim et al 2003), and properties of the substrate (asperity distributions). Some researchers (Ziskind et al 1995) have attempted to explain particle re-suspension based on a force imbalance due to turbulent bursts. Other researchers (Reeks et al 1988;Biasi et al 2001;Reeks and Hall 2001;Ibrahim et al 2008) have argued that the moments induced on surface asperities (a) by instantaneous lift/drag forces (rolling mode) are a more probable mechanism for re-suspension, particularly the short-term variant.…”

Section: Re-suspension Modelmentioning

confidence: 99%

Large Eddy Simulation of Particle Re-suspension During a Footstep

Choi

Edwards

Rosati

et al. 2012

Aerosol Science and Technology

View full text Add to dashboard Cite

Re-suspension of particulate matter under human activity can have a significant impact on particle concentrations in indoor environments. The removal of surface-bound particulates as a person's foot contacts a substrate and the subsequent transport of such particulates through wake entrainment effects and through deposition is an important mechanism for particle dispersion. To study aspects of this event, we perform high-fidelity simulations of particle transport due to the heel-to-toe contact of a foot with a particle-laden carpet. For this purpose, an immersed boundary method is extended to account for particle transport, re-suspension, and deposition near the surface of the foot. Particle deposition is modeled as a combination of gravitational settling, Brownian diffusion, and convective impaction, while a dynamic re-suspension model is used to model particle re-suspension from the surfaces. We demonstrate the details of transient transport phenomena of re-suspended particles during a heel-to-toe foot motion event. The effects of the thickness of the carpet layer, the foot penetration depth into the carpet layer, the foot speed, and particle sizes on the mass re-suspended are investigated. Parametric studies show that a deeper foot penetration into a thinner carpet layer increases particle re-suspension and a faster foot motion also increases the re-suspension. Re-suspension Disclaimer: The views expressed in this article are those of the authors and do not necessarily reflect the views or policies of the US Environmental Protection Agency.Address correspondence to Jack R. Edwards, Department of Mechanical and Aerospace Engineering, North Carolina State University, 1200 Hillsborough Street, Raleigh, NC 27695-7910, USA. E-mail: jredward@ncsu.edu rates increase as the particle size increases for particles in a size range of 1-20 µm. Predicted re-suspension rates are compared with those obtained in recent experiments.

show abstract

Section: Re-suspension Modelmentioning

confidence: 99%

Large Eddy Simulation of Particle Re-suspension During a Footstep

Choi

Edwards

Rosati

et al. 2012

Aerosol Science and Technology

View full text Add to dashboard Cite

show abstract

“…Il existe dans la littérature spécialisée des synthèses récentes dédiées à l'analyse des travaux théoriques sur la mise en suspension par écoulement d'air (Ziskind et al, 1995 ;Alloul-Mmor, 2002). Ces travaux considèrent exclusivement le comportement à proximité immédiate de la paroi où la particule est déposée, c'est-à-dire dans la couche limite.…”

Section: éTudes Théoriquesunclassified

Évaluation du facteur de mise en suspension de contamination dans les installations nucléaires

Boulaud

Gerasimo²,

Martin

et al. 2003

Radioprotection

View full text Add to dashboard Cite

“…Here we are only concerned with deposition and neglect the effects of resuspension. In reality, resuspension of particles may play a role, but the mechanisms of re-suspension are not fully understood and models of resuspension rate remain empirical with large uncertainties (see [26]). In order to make the problem simple and manageable, we look only at the problem of deposition.…”

Section: Introductionmentioning

confidence: 99%

Direct numerical simulation of cylindrical particle-laden gravity currents

2015

View full text Add to dashboard Cite

numerical simulation of cylindrical particle-laden gravity currents. Computers and Fluids, Elsevier, 2015, 123, pp.23-31. <10.1016/j.compfluid.2015 b s t r a c tWe present results from direct numerical simulations (DNS) of cylindrical particle-laden gravity currents. We consider the case of a full depth release with monodisperse particles at a dilute concentration where particle-particle interactions may be neglected. The disperse phase is treated as a continuum and a twofluid formulation is adopted. We present results from two simulations at Reynolds numbers of 3450 and 10,000. Our results are in good agreement with previously reported experiments and theoretical models. At early times in the simulations, we observe a set of rolled up vortices that advance at varying speeds. These Kelvin-Helmholtz (K-H) vortex tubes are generated at the surface and exhibit a counter-clockwise rotation. In addition to the K-H vortices, another set of clockwise rotating vortex tubes initiate at the bottom surface and play a major role in the near wall dynamics. These vortex structures have a strong influence on wall shear-stress and deposition pattern. Their relations are explored as well.

show abstract

Resuspension of particulates from surfaces to turbulent flows—Review and analysis

Cited by 184 publications

References 56 publications

Large Eddy Simulation of Particle Re-suspension During a Footstep

Large Eddy Simulation of Particle Re-suspension During a Footstep

Évaluation du facteur de mise en suspension de contamination dans les installations nucléaires

Direct numerical simulation of cylindrical particle-laden gravity currents

Contact Info

Product

Resources

About