Effects of non-erodible particles on aeolian erosion: Wind-tunnel simulations of a sand oblong storage pile

Furieri, B.; Russeil, S.; Santos, Jane Méri; Harion, J.‐L.

doi:10.1016/j.atmosenv.2013.07.026

Cited by 12 publications

(10 citation statements)

References 20 publications

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“…Paved surfaces with visible trackout could be unlimited reservoirs for high winds. Some of the active and dormant storage piles were not unlimited reservoirs, probably owing to the presence of larger particles (e.g., the surface 31 quarry storage pile contains 58% of gravel as shown in Table S-4) that shielded the smaller ones from wind forces and the shape of the pile (Diego et al, 2009;Furieri et al, 2013).…”

Section: Dust Reservoirsmentioning

confidence: 99%

Wind erosion potential for fugitive dust sources in the Athabasca Oil Sands Region

et al. 2015

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Section: Dust Reservoirsmentioning

confidence: 99%

Wind erosion potential for fugitive dust sources in the Athabasca Oil Sands Region

et al. 2015

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“…These particles are responsible for a variety of serious harmful effects on health, especially related to cardiovascular and respiratory diseases [55]. Emissions due to aeolian erosion of exposed granular materials are strongly influenced by the grain size distribution possibly presenting coarse particles that are not lifted by wind flow [17,48,49,57]. In the range of investigated wind velocities, the basal shear stress is insufficient to lift the large particles of 1 mm in diameter, referred hereafter as non-erodible particles.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…To model pavement, [12] assumed that erosion is finalised when the bed is completely overlaid by non-erodible particles. However, experimental results showed that when erosion stops, potential erodible particles still remain on the surface [11,17]. The accurate prediction of the phenomenon is a complex task due to the uncertainty in the transport processes.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

A simple model to estimate emission of wind-blown particles from a granular bed in comparison to wind tunnel experiments

Ferreira

Furieri

Moctar³

et al. 2019

Geomorphology

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Dust emissions due to aeolian erosion of exposed granular materials are strongly influenced by grain size distribution. Non-erodible particles that are too heavy to be lifted into the air play a protective role in the aeolian erosion process attenuatingemission, which is known as the pavement phenomenon. To date, there is no approach that reliably predicts the reduction in emissions caused by their presence on an aggregate surface. In this work, an analytical model was developed to quantify emissions from particle beds with a wide size distribution. As non-erodible particles accumulate, changes in surface characteristics create increasing shelter for the erodible portion of the bed until the shear on the erodible surface reaches a minimum and emissions cease. The proposed emission model describes the relationship between this minimum value of wind shear and the eroded depth of the bed after the pavement, which in turn gives the emitted mass. In addition, wind tunnel experiments were carried out in order to broaden knowledge of the pavement phenomenon and validate the modelling. A bimodal particle size distribution of sand with erodible and non-erodible particles was used for the tested velocities. Three experimental measurements were carried out: (i) continuous weighing of the emitted mass, (ii) eroded depth of the bed at regular time intervals and (iii) final cover rates of the non-erodible particles using digital analysis of sand bed pictures after experiments. Good agreement between the modelling and experimental results was found. The emission model proposed herein is a simple algebraic expression that demands low computational effort. This approach may serve as a base for an emission model for application in granular materials stockpiles.

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“…As erosion occurs, the concentration of the coarser particles on the pile surface increases. It has been verified that the accumulation of these grains plays a protective role in particle emissions, whether on a flat or an inclined surface [13,21,28,29,38]. Non-erodible particles create wake zones, reducing the drag on pile zones that would otherwise be erodible.…”

Section: Introductionmentioning

confidence: 99%

An experimental and numerical study of the aeolian erosion of isolated and successive piles

et al. 2019

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Open storage yards at industrial sites usually comprise several piles of granular materials, representing a particulate matter source that may significantly deteriorate air quality. The aeolian erosion of stockpiles is affected by changes in airflow patterns due to the pile shape and the presence of nearby piles or buildings. The aim of this study was to analyse the impact of wind erosion of successive parallel stockpiles on flow behaviour and particle emissions. A wind tunnel experiment was conducted in six configurations: one isolated pile and two successive piles separated by gaps of 0.9h and 1.8h (h is the pile height) oriented to 60 • and 90 • with respect to the main wind flow direction. The particles in the piles had a bimodal particle size distribution consisting of sand that was erodible (white) and non-erodible (black) in the investigated velocity range. The contrasting colours enabled the visualisation of the non-erodible sand accumulation. The mean field of the wall shear stress distribution and flow pathlines predicted by numerical simulation were associated with the experimental erosion patterns. The emitted mass was experimentally quantified as the difference between the initial and final

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Effects of non-erodible particles on aeolian erosion: Wind-tunnel simulations of a sand oblong storage pile

Cited by 12 publications

References 20 publications

Wind erosion potential for fugitive dust sources in the Athabasca Oil Sands Region

Wind erosion potential for fugitive dust sources in the Athabasca Oil Sands Region

A simple model to estimate emission of wind-blown particles from a granular bed in comparison to wind tunnel experiments

An experimental and numerical study of the aeolian erosion of isolated and successive piles

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