Surface Roughness Effects on Separated and Reattached Turbulent Flows in Open Channel

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dc.contributor.authorAmpadu-Mintah, Afua
dc.contributor.examiningcommitteeWang, BingChen (Mech. & Manuf. Engg.) Svecova, Dagmar (Civil Engg.)en_US
dc.contributor.supervisorTachie, Mark F. (Mech. & Manuf. Engg.)en_US
dc.date.accessioned2013-07-04T13:59:45Z
dc.date.available2013-07-04T13:59:45Z
dc.date.issued2013-07-04
dc.degree.disciplineMechanical and Manufacturing Engineeringen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractAn 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.description.noteOctober 2013en_US
dc.identifier.urihttp://hdl.handle.net/1993/21699
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectseparated and reattached turbulent flowsen_US
dc.subjectopen-channelen_US
dc.subjectbackward facing stepen_US
dc.subjectParticle image velocimetryen_US
dc.subjectsurface roughnessen_US
dc.titleSurface Roughness Effects on Separated and Reattached Turbulent Flows in Open Channelen_US
dc.typemaster thesisen_US
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