TY - GEN
T1 - Characterization of transition to turbulence in solitary wave boundary layer
AU - Winarta, Bambang
AU - Tanaka, Hitoshi
AU - Yamaji, Hiroto
PY - 2012
Y1 - 2012
N2 - This paper reports on continues an experimental investigation of characterizing transition to turbulence for solitary wave boundary layer in a smooth bed condition. A series of experiments have been carried out by means of a closed conduit solitary wave generation system over the Reynolds number (Re) range 5.64 × 105 - 7.34 × 105. Additionally, the instantaneous velocities were measured by using a Laser Doppler Veloci-meter (LDV) over 50 wave numbers and at 17 to 22 points in the vertical direction. The turbulence intermittency has been analyzed based on experimental data. Moreover, momentum method has been employed for calculating bottom shear stress for all cases. And then, the turbulence intensity is plotted to give clearly description how turbulence generated in the various values of Re. The phase difference and wave friction factor obtained from the present experiment has an excellent agreement with the result of previous studies. Inconsistency critical Reynolds number (Recr) can be found in solitary wave case in terms of phase difference and wave friction factor, this observable fact is difference with sinusoidal wave case which has consistency in Recr.
AB - This paper reports on continues an experimental investigation of characterizing transition to turbulence for solitary wave boundary layer in a smooth bed condition. A series of experiments have been carried out by means of a closed conduit solitary wave generation system over the Reynolds number (Re) range 5.64 × 105 - 7.34 × 105. Additionally, the instantaneous velocities were measured by using a Laser Doppler Veloci-meter (LDV) over 50 wave numbers and at 17 to 22 points in the vertical direction. The turbulence intermittency has been analyzed based on experimental data. Moreover, momentum method has been employed for calculating bottom shear stress for all cases. And then, the turbulence intensity is plotted to give clearly description how turbulence generated in the various values of Re. The phase difference and wave friction factor obtained from the present experiment has an excellent agreement with the result of previous studies. Inconsistency critical Reynolds number (Recr) can be found in solitary wave case in terms of phase difference and wave friction factor, this observable fact is difference with sinusoidal wave case which has consistency in Recr.
KW - Bottom boundary layer
KW - Bottom shear stress
KW - Phase difference
KW - Solitary wave
KW - Transition to turbulence
KW - Turbulence intensity
KW - Turbulence intermittency
KW - Wave friction factor
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U2 - 10.9753/icce.v33.waves.22
DO - 10.9753/icce.v33.waves.22
M3 - Conference contribution
AN - SCOPUS:85087605849
SN - 9780989661119
T3 - Proceedings of the Coastal Engineering Conference
BT - Proceedings of the 33rd International Conference on Coastal Engineering 2012, ICCE 2012
PB - American Society of Civil Engineers (ASCE)
T2 - 33rd International Conference on Coastal Engineering 2012, ICCE 2012
Y2 - 1 July 2012 through 6 July 2012
ER -