Aerodynamic focusing of nanoparticles: II. Numerical simulation of particle motion through aerodynamic lenses

Xiaoliang Wang, Ashok Gidwani, Steven L Girshick, Peter H McMurry

Research output: Contribution to journalReview articlepeer-review

76 Scopus citations

Abstract

We have developed a numerical simulation methodology that is able to accurately characterize the focusing performance of aerodynamic lens systems. The commercial computational fluid dynamics (CFD) software FLUENT was used to simulate the gas flow field. Particle trajectories were tracked using the Lagrangian approach. Brownian motion of nanoparticles was successfully incorporated in our numerical simulations. This simulation tool was then used to evaluate the performance of an aerodynamic lens assembly that was designed to focus 3 nm spherical unit density particles following the guidelines described in Paper I (Wang et al. 2005). Our simulations show that the performance of this lens assembly is close to what is predicted by the design guidelines. The simulations also demonstrate the ability of aerodynamic lenses to focus sub-30 nm spherical unit density particles.

Original languageEnglish (US)
Pages (from-to)624-636
Number of pages13
JournalAerosol Science and Technology
Volume39
Issue number7
DOIs
StatePublished - Jul 2005

Bibliographical note

Funding Information:
Received 2 December 2004; accepted 13 May 2005. This work was supported by NSF (Grant No. DMI-0103169) and the University of Minnesota Supercomputing Institute. Address correspondence to Prof. Peter H. McMurry, 111 Church Street SE, Minneapolis, MN 55455. E-mail: mcmurry@me.umn.edu

Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

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