Swirling pipeflow of non-Newtonian and particle-laden fluids

Tonkin, Ruth Julie Jane (2005) Swirling pipeflow of non-Newtonian and particle-laden fluids. PhD thesis, University of Nottingham.

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Abstract

This thesis describes the application of novel swirl inducing pipe to various pipe configurations, when pumping a range of fluids and fluid / particle mixtures. An extensive experimental programme, incorporating particle image velocimetry and photography, was implemented using a pipe flow loop designed specifically for the purpose.

Experimental data was obtained on the effect of a 4-lobe near-optimal swirl pipe on coal-water, sand-water and magnetite-water slurries of various particle size. Results indicated that swirl induction produced greater benefit for denser slurries and higher concentrations, and that swirl induced into slurries containing larger and denser particles decayed more rapidly. At low velocity, experimental data highlighted a reduction in the total pressure drop experienced across a 3.0m horizontal pipe section, a downward sloping section and vertical pipe bends, when the swirl-inducing pipe was present.

PIV was used to measure the axial and tangential velocity of swirling flows downstream of a near-optimal swirl-inducing pipe. It was confirmed that a significant tangential velocity was generated when pumping water in the turbulent regime, however, when the fluid viscosity was increased, leading to laminar flow, no significant tangential velocity was detected.

Item Type: Thesis (University of Nottingham only) (PhD)
Supervisors: Miles, N.J.
Keywords: Swirl inducing pipe, Particle image velocimetry, Fluid dynamics, Pipe flow loop
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculties/Schools: UK Campuses > Faculty of Engineering > Department of Chemical and Environmental Engineering
Item ID: 11673
Depositing User: EP, Services
Date Deposited: 23 Nov 2010 09:11
Last Modified: 14 Sep 2016 12:21
URI: http://eprints.nottingham.ac.uk/id/eprint/11673

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