High-resolution numerical modelling of flow-vegetation interactions
High-resolution numerical modelling of flow-vegetation interactions
复制标题
水流与植被相互作用的高分辨率数值模拟
DOI：
10.1080/00221686.2014.948502
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发表时间：
2014
影响因子：
2.3
通讯作者：
Marjoribanks T
中科院分区：
文献类型：
--
作者：
Marjoribanks T
本文提出并应用了一个新的三维模型来预报明渠流中的冠状流和湍流动力学。该方法采用了动态浸没边界技术，耦合在一个顺序交错的方式，以大涡模拟。两种不同的生物力学模型的开发取决于植被是由弯曲或拉伸力。对于弯曲工厂，一个模型结构上的欧拉-伯努利梁方程已被开发，而拉伸工厂，一个N-摆模型已被开发。验证水槽数据显示出良好的一致性，并表明，对于一个给定的干密度，模型能够模拟提取能量的平均流量在干尺度，导致阻力不连续性和相关的混合层。
In this paper, we present and apply a new three-dimensional model for the prediction of canopy-flow and turbulence dynamics in open-channel flow. The approach uses a dynamic immersed boundary technique that is coupled in a sequentially staggered manner to a large eddy simulation. Two different biomechanical models are developed depending on whether the vegetation is dominated by bending or tensile forces. For bending plants, a model structured on the Euler–Bernoulli beam equation has been developed, whilst for tensile plants, an N-pendula model has been developed. Validation against flume data shows good agreement and demonstrates that for a given stem density, the models are able to simulate the extraction of energy from the mean flow at the stem-scale which leads to the drag discontinuity and associated mixing layer.