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dc.contributor.supervisor Tachie, Mark F. (Mech. & Manuf. Engg.) en_US
dc.contributor.author Ampadu-Mintah, Afua
dc.date.accessioned 2013-07-04T13:59:45Z
dc.date.available 2013-07-04T13:59:45Z
dc.date.issued 2013-07-04
dc.identifier.uri http://hdl.handle.net/1993/21699
dc.description.abstract An experimental research was performed to study the effects of surface roughness on the characteristics of separated and reattached turbulent flows in an open channel. A backward facing step was used to induce flow separation. The rough surfaces comprised wire mesh grit-80 and sand grains of average diameter 1.5 mm. In each experiment, the Reynolds number based on the step height and freestream velocity of approach flow was fixed at 3240 and the Reynolds number based on the approach flow depth and freestream velocity was kept constant at 25130. Particle image velocimetry (PIV) technique was used to measure the flow velocity. The results showed that roughness effects on the mean and turbulent quantities are evident only in the recovery region. Moreover, roughness effects on the flow dynamics are dependent on the specific roughness element. en_US
dc.subject separated and reattached turbulent flows en_US
dc.subject open-channel en_US
dc.subject backward facing step en_US
dc.subject Particle image velocimetry en_US
dc.subject surface roughness en_US
dc.title Surface Roughness Effects on Separated and Reattached Turbulent Flows in Open Channel en_US
dc.degree.discipline Mechanical and Manufacturing Engineering en_US
dc.contributor.examiningcommittee Wang, BingChen (Mech. & Manuf. Engg.) Svecova, Dagmar (Civil Engg.) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note October 2013 en_US


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