TY - JOUR
T1 - Large-Eddy Simulation of Turbulent Flow over Wavy Wall with Different Wave Steepness
AU - Zhang, Enwei
AU - Wang, Xiaoliang
AU - Liu, Qingquan
N1 - Publisher Copyright:
© The Authors.
PY - 2021/8/5
Y1 - 2021/8/5
N2 - Large-eddy simulation (LES) with dynamic one-equation subgrid-scale stress model was utilized to study the characteristics of turbulent flow over sea-surface generalized as two-dimensional wavy wall with different wave steepness. The statistical characteristics of turbulent field and pressure distribution were presented in detail. The simulation results showed that the separation zones induce stronger convection as the wave steepness increases. Reynolds shear stress near the wall boundary showed positive correlation with the wave steepness, while in the outer region, time-averaged turbulent fields seemed to be insensitive with the wall boundary. The equivalent velocity profiles obtained from the spatial averaging of the time-averaged velocity indicated that lower velocity occurred as the increase of wave steepness due to the increased pressure-induced form drag. The vortex structures were also visualized and showed vertically-bent characteristics which induced negative Reynolds shear stress at the stoss side as the increase of wave steepness that is equivalent to the effect of wave age.
AB - Large-eddy simulation (LES) with dynamic one-equation subgrid-scale stress model was utilized to study the characteristics of turbulent flow over sea-surface generalized as two-dimensional wavy wall with different wave steepness. The statistical characteristics of turbulent field and pressure distribution were presented in detail. The simulation results showed that the separation zones induce stronger convection as the wave steepness increases. Reynolds shear stress near the wall boundary showed positive correlation with the wave steepness, while in the outer region, time-averaged turbulent fields seemed to be insensitive with the wall boundary. The equivalent velocity profiles obtained from the spatial averaging of the time-averaged velocity indicated that lower velocity occurred as the increase of wave steepness due to the increased pressure-induced form drag. The vortex structures were also visualized and showed vertically-bent characteristics which induced negative Reynolds shear stress at the stoss side as the increase of wave steepness that is equivalent to the effect of wave age.
UR - http://www.scopus.com/inward/record.url?scp=85146865932&partnerID=8YFLogxK
U2 - 10.1051/e3sconf/202129903012
DO - 10.1051/e3sconf/202129903012
M3 - Conference article
AN - SCOPUS:85146865932
SN - 2267-1242
VL - 299
JO - E3S Web of Conferences
JF - E3S Web of Conferences
M1 - 03012
T2 - 4th Annual International Conference on Energy Development and Environmental Protection, EDEP 2021
Y2 - 23 July 2021 through 25 July 2021
ER -