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Abstrak - Christian Delvin
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan

COVER - Christian Delvin
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan

BAB II - Christian Delvin
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan

BAB I - Christian Delvin
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan

BAB IV - Christian Delvin
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan

BAB V - Christian Delvin
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan

PUSTAKA - Christian Delvin
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan

Fluid flow over a surface produces a boundary layer, which are typically turbulent. Observing the flow structure of turbulent boundary layers and how roughness affects it allows better understanding on utilizing surface roughness in engineering. Experimental measurements were done on ITB’s closed loop wind tunnel utilizing hotwire anemometry and MUCTA (Melbourne University Constant Temperature Anemometer). Measurements on turbulent boundary layers over a smooth and rough wall were done at low to intermediate Reynolds number (smooth wall: 520 ? Re? ? 1020, rough wall: 860 ? Re? ? 1560). The gathered data were then processed to provide scaling profiles of the turbulent boundary layer. Smooth and rough wall flow structures were compared by constructing the energy spectra of the turbulent boundary layer. It was found that the sand-grained surface roughness reduces the large-scale motions of the turbulent boundary layer.