Turbulence damping of wave boundary layer flow over ripple covered bed

被引：0
|
作者：
Li, Shouqian [1 ]
Lu, Yongjun [1 ]
Zuo, Liqin [1 ]
Roelvink, J. A. [2 ]
机构：
[1] Nanjing Hydraul Res Inst, Nanjing 210029, Jiangsu, Peoples R China
[2] UNESCO IHE Inst Water Educ, NL-2601 Delft, Netherlands
来源：
PROCEEDINGS OF THE 36TH IAHR WORLD CONGRESS: DELTAS OF THE FUTURE AND WHAT HAPPENS UPSTREAM | 2015年
基金：
中国国家自然科学基金;
关键词：
turbulence damping; rippled bed; boundary layer;
D O I：
暂无
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
This paper mainly discussed the turbulence damping of wave boundary layer flow over ripple covered bed through flume experiment and theoretical analysis. Hydrodynamic experiments under current only and wave only were carried out in a wave flume with rippled bed. A PIV and ADV were employed to measure the near bed 2D vertical flow field and high frequency instantaneous velocity, respectively. The relationship between maximum turbulent intensity and bed shear velocity which can be derived from measured data was established to investigate the boundary layer turbulent characteristics. Furtherly, the turbulent characteristics under wave were theoretically explained by comparing the bed shear stress formulas under current only and wave only. The results showed that, the maximum turbulent intensity under current only and waves only can both be expressed proportional to the related bed shear velocity, but with different proportional coefficients. The coefficient under wave is much smaller than that under current, indicating a significant turbulence damping of wave boundary layer flow, which mainly results from the orbital motion-induced stress (uw) over tilde.
引用
收藏
页码：4477 / 4481
页数：5
相关论文
共 50 条
  • [1] Wave boundary layer over a stone-covered bed
    Dixen, Martin
    Hatipoglu, Figen
    Sumer, B. Mutlu
    Fredsoe, Jorgen
    COASTAL ENGINEERING, 2008, 55 (01) : 1 - 20
  • [2] Wave plus current over a ripple-covered bed
    Fredsoe, J
    Andersen, KH
    Sumer, BM
    COASTAL ENGINEERING, 1999, 38 (04) : 177 - 221
  • [3] Velocity and turbulence distribution in combined oscillatory and steady flow boundary layer over a rippled bed
    Wijetunge, J. J.
    COASTAL ENGINEERING JOURNAL, 2006, 48 (03) : 197 - 223
  • [4] MEASUREMENTS OF TURBULENCE IN THE BENTHIC BOUNDARY-LAYER OVER A GRAVEL BED
    WILLIAMS, JJ
    THORNE, PD
    HEATHERSHAW, AD
    SEDIMENTOLOGY, 1989, 36 (06) : 959 - 971
  • [5] Observations of flow and turbulence in the nocturnal boundary layer over a slope
    Monti, P
    Fernando, HJS
    Princevac, M
    Chan, WC
    Kowalewski, TA
    Pardyjak, ER
    JOURNAL OF THE ATMOSPHERIC SCIENCES, 2002, 59 (17) : 2513 - 2534
  • [6] ON THE DEVELOPMENT OF BOUNDARY LAYER FLOW OVER A GRAVEL-BED
    王晋军
    Chinese Science Bulletin, 1991, (20) : 1725 - 1728
  • [7] TURBULENCE MEASUREMENTS IN THE BOUNDARY-LAYER OVER A SAND WAVE FIELD
    MCLEAN, SR
    SMITH, JD
    JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1979, 84 (NC12) : 7791 - 7808
  • [8] Dispersion of suspended particles in a wave boundary layer over a viscoelastic bed
    Ng, Chiu-On
    Wu, Chin H.
    INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE, 2008, 46 (01) : 50 - 65
  • [9] Modeling turbulence perturbation in a laboratory boundary layer flow over hills
    Antonelli, M
    Tampieri, F
    NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA C-COLLOQUIA ON PHYSICS, 2003, 26 (03): : 263 - 285
  • [10] Boundary layer turbulence and flow structure over a fringing coral reef
    Reidenbach, Matthew A.
    Monismith, Stephen G.
    Koseff, Jeffrey R.
    Yahel, Gitai
    Genin, Amatzia
    LIMNOLOGY AND OCEANOGRAPHY, 2006, 51 (05) : 1956 - 1968
12345