Estimate of Drag Coefficient for a Finite Patch of Rigid Cylinders

被引：12

作者：

Cheng, Nian-Sheng ^{[1
,2
]}

Hui, Cai Ling ^{[3
]}

Chen, Xingwei ^{[4
]}

机构：

[1] Zhejiang Univ, Ocean Coll, Zhoushan 316021, Zhejiang, Peoples R China

[2] Nanyang Technol Univ, Sch Civil & Environm Engn, Nanyang Ave, Singapore 639798, Singapore

[3] Prostruct Consulting Pte Ltd, Civil Engn, BLK 165,Bukit Merah Cent, Singapore 150165, Singapore

[4] Fujian Normal Univ, Coll Geog Sci, Fuzhou 350007, Fujian, Peoples R China

来源：

JOURNAL OF HYDRAULIC ENGINEERING | 2019年 / 145卷 / 02期

关键词：

Vegetation patch; Drag coefficient; Reynolds number; Settling velocity; Porosity; CIRCULAR-CYLINDERS; FLOW; ARRAY; VEGETATION; RANGE; MODEL;

D O I：

10.1061/(ASCE)HY.1943-7900.0001561

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This note presents laboratory measurements of the drag coefficient for a finite patch of vegetation that was simulated with a limited number of rigid cylindrical rods. The experiment was designed based on an analogy between the drag imposed by a vegetation patch in an open-channel flow and that experienced by the patch settling in a water tank. The results show that the average drag coefficient calculated from the measured settling velocity can be expressed as a function of the patch porosity. The experimental data are also consistent with previous predictions by large eddy simulations.

引用

页数：5

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