
Abstrak - Christian Delvin
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan

COVER - Christian Delvin
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan

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

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

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

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

PUSTAKA - Christian Delvin
Terbatas  Irwan Sofiyan
» Gedung UPT Perpustakaan
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.