Numerical study on stem-generated turbulence due to emergent rigid vegetation in water waves

被引：2
作者：
Tang, Jun [1 ]
Chen, Yuxi [1 ]
Shen, Yongming [1 ,2 ,3 ]
Cao, Shirui [1 ]
机构：
[1] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China
[2] Guangdong Univ Technol, Sch Ecol Environm & Resources, Guangdong Prov Key Lab Water Qual Improvement & Ec, Guangzhou 510006, Peoples R China
[3] Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou 511458, Peoples R China
来源：
OCEAN ENGINEERING | 2024年 / 304卷
基金：
中国国家自然科学基金;
关键词：
Water wave; Vegetation; Turbulent kinetic energy; OpenFOAM; SUBMERGED MODEL CANOPIES; SEDIMENT RESUSPENSION; KINETIC-ENERGY; FLOW;
D O I：
10.1016/j.oceaneng.2024.117940
中图分类号：
U6 [水路运输]; P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
Based on the RANS equations and applying the waves2Foam solver in OpenFOAM, the study numerically investigated the turbulent kinetic energy (TKE) generated due to emergent rigid vegetation in water waves. The numerical results show that the TKE generated due to emergent vegetation in water waves increases with decreasing water depth and increasing wave height and period, as well as vegetation density and stem diameter. Moreover, compared to wave height, the influence of wave period on the stem-generated TKE in waves is more significant. Furthermore, the ratio of the amplitude of wave motion trajectory to stem spacing has a significant impact on the stem-generated TKE in waves. When the amplitude of wave motion trajectory is less than half of the stem spacing, the stem-generated TKE in waves is similar to the TKE of the bare bed in waves. In the case where the amplitude of wave motion trajectory is greater than half of the stem spacing, the stem-generated TKE in waves in the front of the vegetation will be significantly enhanced. Based on the study, an improved formula is proposed for predicting the stem-generated turbulence in waves.
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页数：10
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