Aerodynamic resuspension and contact removal of energetic particles from smooth, rough, and fibrous surfaces

Particulate matter resuspension from simulated urban green floors using a wind tunnel-mounted closed chamber

“…First, it overcomes the size limitation. A number of existing studies have used a small target surface (usually <100 cm 2 ) because their research objectives focused on the effects of the physical and chemical characteristics of pure materials on resuspension ( Kim et al, 2016 ; Kottapalli & Novosselov, 2021 ; Li et al, 2022 ). This small surface area makes it possible to correctly quantify the total number of resuspended particles within the system by counting the number of particles remaining on the surface before and after resuspension.…”

“…One of the main reasons why there are few previous studies simulating the effect of different urban green floor conditions on PM resuspension could be the absence of a proper experimental setup at this scale. The existing PM resuspension experiment settings are usually equipped with sophisticated controls over environmental conditions and contamination ( Kim et al, 2016 ; Kottapalli & Novosselov, 2021 ; Li et al, 2022 ). As these experiments focus on the specific traits of the surface affecting resuspension, the scale of target surface is generally small (microscopic, nanoscopic) and only the pure surface materials were used.…”

Adhesion Forces of Radioactive Particles Measured by the Aerodynamic Method - Validation with Atomic Force Microscopy and Comparison with Adhesion Models

“…In a recent study (Peillon et al, 2020) we have addressed these issues using an aerodynamic system working with calibrated air flows to perform consistent sampling of micrometer particles deposited on the inner-walls of a fusion reactor. The use of air flows has the advantage that it does not require mechanical action to loosen the particles and the efficiency of this technique can be equivalent or even superior to traditional smear techniques as shown recently by Kottapalli and Novosselov (2021). This study carried out in the WEST tokamak allowed to identify tungsten particles of spherical shape and micrometric sizes.…”

Image analysis for the time-resolved description of microparticle resuspension under transient airflow

“…The particle resuspension phenomenon that involves the detachment and re-entrainment of a particle from a surface due to an airflow plays an essential role in various industrial applications such as semiconductor manufacturing, pharmaceutical production, nuclear maintenance, or dust entrainment linked to human activities (Gradoń, 2009;Evangeliou et al, 2016;Qian et al, 2014). In particular, understanding this phenomenon enables the prediction of airborne particulate contamination, especially in Heating, Ventilation, and Air-Conditioning (HVAC) systems (D'Alicandro et al, 2021;Kottapalli and Novosselov, 2021;Raveh-Amit et al, 2022). The scope of this study is the resuspension of mono-layer spherical-shaped microparticles during fan acceleration in a ventilated duct.…”