Effect of bed roughness on turbulent boundary layer and net sediment transport under asymmetric waves

Numerical modeling of boundary layer flows for a solitary wave

“…However, these results have not been validated with the experimental data for high Reynolds number. Suntoyo and Tanaka (2009) have investigated rough turbulent boundary layer characteristics under cnoidal waves for high roughness using the baseline (BSL) k-u model validated by the experimental data and excellent agreement was obtained for vertical velocity profile, turbulent intensity distribution and bottom shear stress. The BSL k-u model could predict well the asymmetric behavior under cnoidal waves.…”

“…This phenomenon is different with the oscillatory boundary layer behavior for cnoidal waves as well as saw-tooth waves in which the overshooting velocity was influenced by the acceleration effect and the velocity magnitude. Both higher velocity amplitude and acceleration produced higher velocity overshooting as shown by Suntoyo et al (2008) and Suntoyo and Tanaka, H. (2009), respectively.…”

Evaluation de profils de viscosité turbulente en couches limites oscillantes par un modèle à deux équations k-ω

“…En génie côtier, la viscosité turbulente est obtenue soit à partir de modèles mathématiques souvent issus de la modélisation statistique de la turbulence (modèles à deux équations k-ε, k-ω, …) (FREDSOE & DEIGAARD, 1992 ;SUNTOYO & TANAKA, 2009), ou à partir des modèles analytiques ou empiriques (FREDSOE & DEIGAARD, 1992 ;LIU & SATO, 2006 ;ABSI, 2010). La figure (1) présente quelques profils de viscosité turbulente dits multicouches.…”

Modelling of the COD, TSS, Phosphate and Nitrate Distribution Due to the Sidoardjo Mud Flow into Porong River Estuary

“…Many researchers have studied the sediment transport rate induced by wave motion that have a strongly non-linier shape with respect to horizontal and vertical axis, e.g 3,4,5 . Recently, 6 has conducted the comprehensive study related the distribution of sediment transport and morphological change in rivers and Porong River estuary.…”