Title page for etd-1026114-184704


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URN etd-1026114-184704
Author Kuan-Wei Lee
Author's Email Address No Public.
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Department Mechanical and Electro-Mechanical Engineering
Year 2014
Semester 1
Degree Master
Type of Document
Language English
Title Effects of staggered fiber arrangement on aerosol particle transport and deposition in obstructed laminar flows using lattice Boltzmann method
Date of Defense 2014-08-25
Page Count 65
Keyword
  • Particle loading
  • Lattice Boltzmann cell automation method
  • Particle capture efficiency
  • Lattice Boltzmann Method
  • Staggered fibers
  • Abstract The aim of this paper is to present a 2-D computational model of particle-laden flows over staggered fibers at a Reynolds number of 1 by using a Lattice Boltzmann method. The trajectory of particle motion are described by Lagrangian tracking method with a combination of drag, gravity, Saffman lift force, Brownian forces acting on the particles. This study investigated the effect of packing density and fiber geometry in particle size from 7 nm to 500 nm, the range includes main particle collection mechanisms: Brownian diffusion, interception and inertial impaction. The packing density of fiber ranges from 5.6% to 19.63%. Present results show the correlation between fiber arrangements and particle collection. The fiber geometry adopted in the study includes cylinder, diamond and square. It is found out that among the geometries studied, fibers with diamond shape have higher particle capture efficiency in the interception mechanism dominated cases. We also simulate the particle loading on a single fiber and two attached fibers using a Lattice Boltzmann cellular automata method in Brownian diffusion dominated cases. The simulation results present the patterns of particle deposition and the dendrite structure on fiber surface.
    Advisory Committee
  • Chien-Chou Tseng - chair
  • Sheng-Lun Lin - co-chair
  • Chih-Neng Hsu - co-chair
  • Kuang C. Lin - advisor
  • Files
  • etd-1026114-184704.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2014-11-26

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