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首页> 外文期刊>Journal of hydraulic research >A new integrated, hydro-mechanical model applied to flexible vegetation in riverbeds
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A new integrated, hydro-mechanical model applied to flexible vegetation in riverbeds

机译：一种新的集成式水力力学模型，应用于河床中的柔性植被

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摘要

This paper suggests a simple new numerical scheme for calculating the vertical velocity profile, turbulent shear stress distribution, and canopy deflection for flow in vegetated channels. The scheme is derived from the simplified, steady Reynolds equation (momentum balance) and its vertical integration. This study includes an experiment that compares and calibrates the numerical model to flume data. Fourteen runs were performed in a laboratory flume, of which nine involved natural grass (cultivated barley) and five involved plastic plants (PVC). Turbulent diffusion coefficient, mixing length, and a resistance equation (drag coefficient Cd vs. Reynolds number) were the input parameters for the numerical model. Parameters with physical meaning were calibrated. This scheme offers a low computation time and good estimation of plant deflection and velocity and stress profiles.
机译：本文提出了一种简单的新数值方案，用于计算植被通道中的水流的垂直速度剖面，湍流切应力分布和冠层挠度。该方案源自简化的稳定雷诺方程（动量平衡）及其垂直积分。这项研究包括一个比较和校准数值模型以得出水槽数据的实验。在实验室水槽中进行了14次运转，其中9次涉及天然草（栽培的大麦），另外5次涉及塑料植物（PVC）。湍流扩散系数，混合长度和阻力方程（阻力系数Cd对雷诺数）是数值模型的输入参数。校准具有物理意义的参数。该方案提供了较低的计算时间，并且可以很好地估计植物的挠度，速度和应力分布。

著录项

  • 来源
    《Journal of hydraulic research》 |2008年第5期|579-597|共19页
  • 作者

    D. VELASCO; A. BATEMAN; V. MEDINA;

  • 作者单位

    Hydraulic, Maritime and Environmental Engineering Department, Technical University of Catalonia (GITS-UPC), ETSCCPB,Av/Gran Capitan s, 08034 Barcelona, Spain;

    Hydraulic, Maritime and Environmental Engineering Department, Technical University of Catalonia (GITS-UPC), ETSCCPB, Av/ Gran Capitan s, 08034 Barcelona, Spain;

    Hydraulic, Maritime and Environmental Engineering Department, Technical University of Catalonia (GITS-UPC), ETSCCPB, Av/Gran Capitan s, 08034 Barcelona, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    drag forces; numerical modelling; riverine vegetationl; turbulent stresses;

    机译：阻力数值建模;河流植被湍流压力;

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