Effect of correcting near-wall forces on nanoparticle transport in a microchannel

• Published in: Particuology Vol. 16; no. 5; pp. 84 - 90
• Main Authors: Andarwa, S., Basirat Tabrizi, H., Ahmadi, G.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2014
• Subjects: Capture efficiency; Hindered diffusion; Microchannel; Nanoparticle; Wall-presence effect; 势力; 各向异性; 微通道; 纳米粒子; 纳米颗粒; 运输过程; 近壁效应; 通道宽度; Hindered diffusion; Nanoparticle; Microchannel; Capture efficiency; Wall-presence effect
• ISSN: 1674-2001; 2210-4291
• DOI: 10.1016/j.partic.2013.11.007

This paper studies the importance of corrections that account for the presence of walls on the forces act- ing on nanoparticles during their transport in microchannels.Theoretical and experimental investigations have reported anisotropic and hindered motion of nanoparticles near a microchannel wall. To investigate the influence of the near-wall effects, various conditions were examined. In particular, computer simu- lations were performed with and without the near-wall correction of forces. The corresponding capture efficiency and the average penetration of the captured nanoparticles were compared, and the importance of the near-wall corrections was assessed. Effects were evaluated for the nanoparticle diameter, the chan- nel width, the channel length, and the pressure gradient. The results indicate that the inclusion of wall effects is crucial for the analysis of nanoparticle transport in microchannels.