Progress in particle resuspension from rough surfaces by turbulent flows

Monte Carlo modelling of particle resuspension on a flat surface

“…Many models have been developed in the last two decades. Comprehensive reviews concerning resuspension models can be found in Zhang (2011), Ziskind et al (1995), Henry & Minier (2014a) and Stempniewicz et al (2008). In general, theoretical models developed to simulate and predict the resuspension properties are divided into two categories: those based on the balance resulting from the aerodynamic and adhesive forces acting on a particle, called quasi-static models (Reeks & Hall, 2001); and those based on the removing of particles by energy accumulation, described in terms of the accumulation of kinetic energy of the flow, called dynamic models.…”

“…In general, theoretical models developed to simulate and predict the resuspension properties are divided into two categories: those based on the balance resulting from the aerodynamic and adhesive forces acting on a particle, called quasi-static models (Reeks & Hall, 2001); and those based on the removing of particles by energy accumulation, described in terms of the accumulation of kinetic energy of the flow, called dynamic models. However, given the large amount of diverse work, the debating points and the models that may not fit in these two raw categories, a new classification has been recently proposed to account for recent developments in resuspension models (Henry & Minier, 2014a).…”

“…As one can expect, the choice of a force balance or a moment balance approach is related to the assumed motion of particles: rolling, described by moment balance, while sliding and lifting are properly described by a force balance (Ibrahim et al, 2008). As emphasized in a recent review (Henry & Minier, 2014a), the relative importance of rolling and 'burst-type' resuspension (by turbulent flows) depends on the size of particles: small particles which are well embedded in the viscous sublayer are more sensitive to rolling motion while larger particles are more affected by 'burst-type' resuspension.…”

Experimental study of forces on freely moving spherical particles during resuspension into turbulent flow

“…Prediction of lift-off events in turbulent flows requires understanding of both the surrounding flow field and the particle-flow interaction. The latter is based on the balance of forces and moments resulting from stress applied on the particle by the local flow and the restrictive forces of gravity and surface/particle interactions [43,15].…”

An experimental study on particle resuspension in a room with impinging jet ventilation

“…A number of studies have been conducted to investigate the mechanisms for causing particle resuspension, such as indoor airflow [24e26], applied forces on particles [27,28] and surface roughness [29,30]. Indoor particle resuspension [19,31e36] has also received increasing attention due to people spend more and more time indoors and this leads to an increased demand for improving the indoor quality.…”