Use of a simple model for the interpretation of experimental data on particle resuspension in turbulent flows

Biasi, L.; Reyes, Amelia de los; Reeks, Michael W.; Santi, G.F. De

doi:10.1016/s0021-8502(01)00048-9

Cited by 84 publications

(47 citation statements)

References 17 publications

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“…4. Schematic of particle-substrate contact for the dynamic re-suspension model (Biasi et al 2001). (Reeks and Hall 2001;Ibrahim et al 2003), and properties of the substrate (asperity distributions).…”

Section: Re-suspension Modelmentioning

confidence: 99%

“…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%

“…We consider the dynamic re-suspension model of Reeks and coworkers (Biasi et al 2001), as shown in Figure 4. The resuspension rate constant with a Gaussian assumption can be formulated as…”

Section: Re-suspension Modelmentioning

confidence: 99%

“…Note that F L and F D are the lift and drag forces, respectively. The geometric factor is assumed as r/a ∼ 100, where a is a distance between asperities (Biasi et al 2001). We use the semiempirical formula for the drag and lift forces from Biasi et al (2001), which is based on those in a turbulent channel flow:…”

Section: Re-suspension Modelmentioning

confidence: 99%

“…The substrate is assumed to be a thin carpet layer, which is modeled as a porous medium. To model particle detachment from the floor, we implement a dynamic re-suspension model (the so-called "Rock 'n' Roll" model) of Reeks and coworkers (Reeks et al 1988;Biasi et al 2001;Reeks and Hall 2001). This model assumes that the moments induced on surface asperities by instantaneous lift and drag forces (rolling mode) are a more probable mechanism for short-term re-suspension.…”

Section: Introductionmentioning

confidence: 99%

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Large Eddy Simulation of Particle Re-suspension During a Footstep

Choi

Edwards

Rosati

et al. 2012

Aerosol Science and Technology

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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.

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Section: Re-suspension Modelmentioning

confidence: 99%

Section: Re-suspension Modelmentioning

confidence: 99%

“…We consider the dynamic re-suspension model of Reeks and coworkers (Biasi et al 2001), as shown in Figure 4. The resuspension rate constant with a Gaussian assumption can be formulated as…”

Section: Re-suspension Modelmentioning

confidence: 99%

Section: Re-suspension Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Large Eddy Simulation of Particle Re-suspension During a Footstep

Choi

Edwards

Rosati

et al. 2012

Aerosol Science and Technology

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Analysis of Adhesion Forces Between Particles and Wall Based on the Vibration Method

Hein

Hucke

Ripperger

2002

Part. Part. Syst. Charact.

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An indirect method for the measurement of adhesion forces between a particle and a wall is presented. The vibration method [1] is based on particle re‐entrainment from a vertical‐sinoidal vibrating surface caused by its inertia at a certain acceleration. Acceleration of the vibrating surface is measured and calibrated using a laser‐scanning‐vibrometer. Correlating particle re‐entrainment events with acting acceleration permits the calculation of adhesion forces. For horizontal dislocation of re‐entrained particles the vibrating surface is placed in a flow channel and exposed to a laminar air flow (Rechannel=1514) parallel to the surface. Adhesion force measurements were carried out for glass spheres (20–30 and 60‐70 μm), tin spheres (20–30 μm) and corn starch‐fumed silica mixtures (10–20 μm) on a silicon wafer substrate at an air temperature of 20–25°C and relative humidity 8–14%. Experimentally obtained values were compared with a model presented by Rabinovich et al. [2] based on the Rumpf model, which integrates the r.m.s value of the contact surfaces measured with atomic force microscopy (AFM). It was found that adhesive force agreed approximately with the van der Waals force.

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Aufwirbelung von auf Oberflächen abgelagerten Partikelschichten

Schmidt

Nitschke

2006

Chemie Ingenieur Technik

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Die Resuspension, die Wiederaufwirbelung feiner sedimentierter Partikel von Oberflächen, hat weitreichende Bedeutung in Bereichen der Verfahrenstechnik, des Umweltschutzes und des täglichen Lebens. Besondere Aufmerksamkeit ist der Wiederaufwirbelung von brennbaren Stäuben zu widmen. Hieraus ergibt sich das Gefährdungspotenzial von Staubexplosionen. Die Wiederaufwirbelung von Stäuben ist zum Teil an den diskutierten Feinstaubbelastungen in den Innenstädten beteiligt. Zum einen ergeben sich durch Resuspension gesundheitliche Schädigungen, zum anderen können auch wirtschaftliche Schäden auftreten. Auf Grund von Ablösungen von Partikelschichten, z. B. in zuführenden Rohrleitungen, können technische Systeme mit einer erhöhten Staubkonzentration belastet werden. Dies führt häufig zu einer Verringerung der Lebensdauer des Systems. Mit Hilfe eines besseren Verständnisses der zugrunde liegenden Vorgänge können wirksamere Minderungsmaßnahmen entwickelt werden. Vor diesem Hintergrund liefert der Beitrag eine Übersicht über die in der Literatur dokumentierten Modellansätze zum Verständnis der Wiederaufwirbelung von Partikeln im Größenbereich von etwa 1 bis 50 μm.

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Use of a simple model for the interpretation of experimental data on particle resuspension in turbulent flows

Cited by 84 publications

References 17 publications

Large Eddy Simulation of Particle Re-suspension During a Footstep

Large Eddy Simulation of Particle Re-suspension During a Footstep

Analysis of Adhesion Forces Between Particles and Wall Based on the Vibration Method

Aufwirbelung von auf Oberflächen abgelagerten Partikelschichten

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