Exploring deposition pattern characteristics of aerosols and bioaerosols by inertial impaction for the development of real-time silicon MEMS mass detection systems

CFD-DEM Coupling Model for Deposition Process Analysis of Ultrafine Particles in a Micro Impinging Flow Field

“…R 2 is defined as the radius of the ring deposit. stk affects the deposit patterns in Figure 9, which was demonstrated before [5][6][7]10,41]. As stk increases, the halo gets closer to the primary deposit until it vanishes, thus R 0 decreased, which agrees favorably well with the experimental result [8].…”

“…Halo deposit which is ring-shaped was also mentioned in the experimental results [8,11]. Moreover, the deposition pattern is highly similar to the phenomenon seen in the experimental testing [6] with d p = 0.92 µm and d p = 2.07 µm, but the ring deposit occurred with d p = 2.53 µm and d p = 3.83 µm on Si surfaces by inertial impaction. 1.12 \…”

“…Particle bounce is a major concern when using impactors [ 5 , 6 , 11 , 31 , 32 , 33 ]. The JKR model has been used to analyze the particle movement in the impactor [ 18 , 34 , 35 ].…”

“…Recently, it has been stated that the thickness and diameter of the ring deposition changed with the ratio of the nozzle-to-plate distance to the nozzle diameter and the particle size through experiments [ 5 ]. Soysal et al [ 6 ] analyzed particle deposition patterns with a lab-made inertial impactor. They defined the deposit shape for three types, namely the ring, the halo, and the disk.…”

“…Several mechanisms have been proposed through analysis of experiment results to explain the formation of the “halo” deposits, such as gravitational sedimentation, the hydrodynamic effect, particle inertia, Magnus lift, Saffman lift, and particle rebound and re-entrainment in most researches [ 6 , 7 , 8 , 9 , 10 , 11 ]. The combined method of computational fluid dynamics and discrete particle method (CFD-DPM) considered a powerful and reliable technique was utilized to simulate particle movement in the impactor to achieve the location of particle deposition [ 12 ].…”