Analysis on energy dissipation by turbulence and turbulence prevention by sediments

被引:0
|
作者
Chen, X. [1 ]
Hu, R. [1 ]
机构
[1] Department of Geography, Zhongshan University, Guangzhou 510275, China
来源
Zhongshan Daxue Xuebao/Acta Scientiarum Natralium Universitatis Sunyatseni | 2001年 / 40卷 / 05期
关键词
D O I
暂无
中图分类号
学科分类号
摘要
The flood process is analyzed in totality and in time steps respectively. It was found that at each time step the hydrological elements of a flood process, such as sediment contents, turbulent velocity and resistance slope, vary in direct proportion with each other, which shows that energy dissipation by turbulence is dominant. While for the whole flood process the turbulence prevention by sediments appears to be a controlling factor due to the accumulative effect of intermittent slipping of sediments from flow. Comparing those flood processes with similar discharges in the long-term flood records, the phenomenon of sediments preventing turbulence is also found. The features is found to be in accordance with the results of steady flow in laboratory flume, i. e., for the flood with larger sediment contents in flood season, its weighted mean velocity is also larger but its weighted mean resistant slope is smaller. In this paper, both features of energy dissipation by turbulence and turbulence prevention by sediments are demonstrated by measured data in Yangtze River and Yellow River.
引用
收藏
页码:113 / 117
相关论文
共 50 条
  • [41] Universality of turbulence energy rate dissipation probability distribution
    Vanyan, PL
    IZVESTIYA AKADEMII NAUK FIZIKA ATMOSFERY I OKEANA, 1995, 31 (06): : 767 - 773
  • [42] LANGMUIR TURBULENCE AND DISSIPATION OF HIGH-FREQUENCY ENERGY
    GALEEV, AA
    SAGDEEV, RZ
    SHAPIRO, VD
    SHEVCHENKO, VI
    ZHURNAL EKSPERIMENTALNOI I TEORETICHESKOI FIZIKI, 1977, 73 (04): : 1352 - 1369
  • [43] Velcro measurement of turbulence kinetic energy dissipation rate ε
    Gargett, AE
    JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY, 1999, 16 (12) : 1973 - 1993
  • [44] THE ENERGY-DISSIPATION FUNCTION FOR TURBULENCE CLOSURE THEORY
    THERRY, G
    ANDRE, JC
    DEBAR, R
    PHYSICS OF FLUIDS, 1987, 30 (03) : 917 - 918
  • [45] Energy dissipation and pressure in 4d turbulence
    Gotoh, Toshiyuki
    Nakano, Tohru
    Shiga, Yoshitaka
    Watanabe, Yusaku
    IUTAM SYMPOSIUM ON COMPUTATIONAL PHYSICS AND NEW PERSPECTIVES IN TURBULENCE, 2008, 4 : 27 - +
  • [46] ENERGY DISSIPATION IN MAGNETOHYDRODYNAMIC TURBULENCE: COHERENT STRUCTURES OR ''NANOFLARES''?
    Zhdankin, Vladimir
    Boldyrev, Stanislav
    Perez, Jean Carlos
    Tobias, Steven M.
    ASTROPHYSICAL JOURNAL, 2014, 795 (02):
  • [48] Analysis and modelling of anisotropies in the dissipation rate of turbulence
    Speziale, CG
    Gatski, TB
    JOURNAL OF FLUID MECHANICS, 1997, 344 : 155 - 180
  • [49] Changing of energy dissipation in the transition of laminar flow to turbulence
    Girgidov, A. D.
    MAGAZINE OF CIVIL ENGINEERING, 2011, 23 (05): : 49 - 76
  • [50] Origin of the imbalance between energy cascade and dissipation in turbulence
    Valente, P. C.
    Onishi, R.
    da Silva, C. B.
    PHYSICAL REVIEW E, 2014, 90 (02)