Aerodynamic Aerosol Classifier

• Author / Creator

  Tavakoli, Farzan

• 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.

• Subjects / Keywords

  • Nanoparticles
  • Relaxation Time
  • Aerodynamic aerosol classifier
  • AAC
  • Microchannel

• Graduation date

  Spring 2014

• Type of Item

  Thesis

• Degree

  Doctor of Philosophy

• DOI

  https://doi.org/10.7939/R3SF2MJ77

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.