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Towards turbulence modulation in concentrated solid-liquid flows

  • Author / Creator
    Agrawal, Yogesh K
  • There are numerous examples of dispersed turbulent two-phase flows in engineering and environmental processes. In particular, dispersed solid-liquid flows, also known as slurry flows, have many industrial applications such as transportation of coal, ore, and oil sands. Slurry transportation through pipelines is typically highly turbulent in nature. The addition of solid particles affects the turbulence intensity of the liquid phase, which is called turbulence modulation. The physical mechanisms through which particles affect fluid turbulence are poorly understood. Experimental studies on turbulence modulation are limited to low slurry concentration and relatively low Reynolds numbers. No experiments have been conducted to investigate turbulence modulation in coarse particle concentrated slurries at high Reynolds numbers. In the present study, a non-intrusive optical measurement method, particle image velocimetry, and refractive index matching technique is applied to investigate turbulence modulation in concentrated solid-liquid flow in a large scale vertical pipe loop for a relatively high Reynolds number (Re = 198 000). Bench scale refractive index matching is performed to investigate the refractive index of the potassium thiocyanate (KSCN) / water solution as function of temperature and concentration, quantitatively and qualitatively. A large scale vertical pipe loop facility is designed and commissioned to handle the corrosive, toxic, and abrasive nature of the concentrated slurry. This project also highlights many of challenges associated with large-scale refractive index matching tests and subsequent data analysis.

  • Subjects / Keywords
  • Graduation date
    2016-06
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R38S4JT9H
  • 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.
  • Language
    English
  • Institution
    University of Alberta
  • Degree level
    Master's
  • Department
    • Department of Mechanical Engineering
  • Supervisor / co-supervisor and their department(s)
    • Nobes, David (Mechanical Engineering)
    • Sanders, Sean (Chemical and Materials Engineering)
  • Examining committee members and their departments
    • Martin, Andrew(Mechanical Engineering)