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Session: Jets and Wakes 2
Session starts: Tuesday 25 August, 15:00
Presentation starts: 15:15
Room: Room E

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Seyed Sobhan Aleyasin (University of Manitoba)
Mark Tachie (University of Manitoba)
Mike Koupriyanov (Price Industries Limited)
Tom Epp (Price Industries Limited)

Abstract:
An experimental study was undertaken to investigate low Reynolds number effects on mixing characteristics and turbulent transport phenomena in the near and intermediate regions of free orifice jets. The cross-sections examined were round, square and ellipse of aspect ratio 3. For each orifice cross-section, detailed velocity measurements were obtained at the following 4 Reynolds number based on the equivalent diameter and maximum velocity: 2500, 4300, 8500 and 17000. A high resolution particle image velocimetry was used to conduct measurements in the symmetry planes that extend from the exit to 15 equivalent diameters. Preliminary results show that an axis-switching happens at 2.7 equivalent diameters in the case of ellipse nozzle which leads to a higher spread rate compared to square and round ones. Also increase in Reynolds number decreases the jet widths.