首页|The influence of drag parameter on submerged vegetation flow simulation using a porous approach

The influence of drag parameter on submerged vegetation flow simulation using a porous approach

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
In simulating vegetated flows using the porous approach,the reasonableness of the drag coefficient significantly impacts the calculation results.This study employs large eddy simulation(LES)to quantitatively investigate the effect of drag parameters on key flow characteristics in submerged vegetated flows.The results indicate that changes in the drag coefficient significantly alter the velocity in the middle of the vegetation layer and near the water surface in the free-flow layer.Compared with longitudinal velocity,the drag coefficient has a more pronounced effect on the vertical distribution of Reynolds stress,especially its peak at the top of the vegetation layer.The porous approach can accurately reproduce the vertical distribution of longitudinal velocity and Reynolds stress,consistent with experimental measurements,only when shear-scale flow dominates.Due to the high-intensity secondary flow under moderate vegetation density,fluctuations in the drag coefficient have a more significant impact on the numerical results than in very dense vegetation.Therefore,selecting the drag coefficient value should be done cautiously,especially in the absence of experimental measurements for validation.

Drag parameterlarge eddy simulation(LES)submerged vegetationsecondary flowporous approach

Meng-yang Liu、Yi-sen Wang、Yi-qing Gong、Shu-xia Wang

展开 >

College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China

Key Laboratory of Hydrologic-Cycle and Hydrodynamic-System of Ministry of Water Resources,Hohai University,Nanjing 210098,China

State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,China

River Research Department,Changjiang River Scientific Research Institute,Wuhan 430010,China

Institute of Water Science and Technology,Hohai University,Nanjing 210098,China

展开 >

National Natural Science Foundation of ChinaPostdoctoral Innovation Talents Support ProgramChina Postdoctoral Science FoundationJiangsu Funding Program for Excellent Postdoctoral Talent

52309088BX202301062023M7309322023ZB608

2024

10.1007/s42241-024-0046-2

水动力学研究与进展B辑
中国船舶科学研究中心

水动力学研究与进展B辑

CSTPCDEI
影响因子：0.596
ISSN：1001-6058
年,卷(期)：2024.36(4)