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Aerodynamic Aerosol Classifier Open Access


Other title
Relaxation Time
aerodynamic aerosol classifier
Type of item
Degree grantor
University of Alberta
Author or creator
Tavakoli, Farzan
Supervisor and department
Olfert, Jason S.
Examining committee member and department
Finlay, Warren (Mechanical Engineering)
Olfert, Jason S.(Mechanical Engineering)
Lange, Carlos (Mechanical Engineering)
Vehring, Reinhard (Mechanical Engineering)
Dhaniyala, Suresh ( Mechanical & Aeronautical Engineering, Clarkson University)
Department of Mechanical Engineering

Date accepted
Graduation date
Doctor of Philosophy
Degree level
A new aerosol particle classifier, the Aerodynamic Aerosol Classifier (AAC), is presented with some of its applications. The instrument uses a centrifugal force and sheath flow between two concentric rotating cylinders to produce a monodisperse aerosol classified by aerodynamic diameter. Since this instrument does not require charged particles, it produces a true monodisperse aerosol without artefacts caused by multiply-charged particles like other classifiers. This work reports the theoretical and experimental results of the new instrument with some of its applications. Two diffusion models and two non-diffusion models have been used to predict the performance of the AAC. The transfer functions were obtained as a function of the particle relaxation time and the particle aerodynamic diameter. The transfer function has been studied for different flow rates. PSL (polystyrene latex) particles and DOS (DioctylSebacate) along with a differential mobility analyzer (DMA) were used to verify the instrument and to obtain the experimental transfer function. A DMA and the AAC were used in tandem to measure the effective density, dynamic shape factor, and the mass of soot particles emitted from an inverted burner and DOS droplets.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
Tavakoli F. and Olfert J. S. (2013). An Instrument for the Classification of Aerosols by Particle Relaxation Time: Theoretical Models of the Aerodynamic Aerosol Classifier, Aerosol Science and Technology, 47:8, 916-926.Tavakoli, F., Mitra, S. K, Olfert, J. S. (2011). Aerosol penetration in microchannels, Journal of Aerosol Science, 42 (5), 321-328.

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