On the scaling of drag reduction by reconfiguration in plants

被引：68
作者：
de Langre, Emmanuel [1 ]
Gutierrez, Alvaro [1 ,2 ]
Cosse, Julia [1 ,3 ]
机构：
[1] Ecole Polytech, Dept Mech, LadHyX, CNRS, F-91128 Palaiseau, France
[2] Univ Politecn Madrid, Madrid 38040, Spain
[3] CALTECH, Pasadena, CA 91125 USA
来源：
COMPTES RENDUS MECANIQUE | 2012年 / 340卷 / 1-2期
关键词：
Drag; Elasticity; Plates; Beams; Biomechanics; Plants; WIND; FLEXIBILITY; FLOW;
D O I：
10.1016/j.crme.2011.11.005
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Slender flexible structures such as plants are deformed by external flow. When the deformation is significant, this results in a reduction of drag. We give a theoretical value of the exponent that characterizes the drag law. This theoretical value is shown to compare well with experimental data on a very large variety of plants. It is found that reconfiguration affects more the local bending stress than the total drag. Moreover, a non-linearity in the bending law does not affect significantly the mechanism. (C) 2011 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：35 / 40
页数：6
相关论文
共 23 条
[1]  
Albayrak I., 2011, AQUATIC SCI RES BOUN, P1
[2]   Drag reduction through self-similar bending of a flexible body [J].
Alben, S ;
Shelley, M ;
Zhang, J .
NATURE, 2002, 420 (6915) :479-481
[3]   How flexibility induces streamlining in a two-dimensional flow [J].
Alben, S ;
Shelley, M ;
Zhang, J .
PHYSICS OF FLUIDS, 2004, 16 (05) :1694-1713
[4]   The hydrodynamic effects of shape and size change during reconfiguration of a flexible macroalga [J].
Boller, ML ;
Carrington, E .
JOURNAL OF EXPERIMENTAL BIOLOGY, 2006, 209 (10) :1894-1903
[5]   Effects of wind on plants [J].
de Langre, Emmanuel .
ANNUAL REVIEW OF FLUID MECHANICS, 2008, 40 :141-168
[6]  
Denny M, 2002, J EXP BIOL, V205, P1355
[7]   Reorientation of daffodil (Narcissus: Amaryllidaceae) flowers in wind:: Drag reduction and torsional flexibility [J].
Etnier, SA ;
Vogel, S .
AMERICAN JOURNAL OF BOTANY, 2000, 87 (01) :29-32
[8]   MECHANICAL CONSEQUENCES OF SIZE IN WAVE-SWEPT ALGAE [J].
GAYLORD, B ;
BLANCHETTE, CA ;
DENNY, MW .
ECOLOGICAL MONOGRAPHS, 1994, 64 (03) :287-313
[9]   Drag coefficient and plant form response to wind speed in three plant species:: Burning Bush (Euonymus alatus), Colorado Blue Spruce (Picea pungens glauca.), and Fountain Grass (Pennisetum setaceum) -: art. no. 4760 [J].
Gillies, JA ;
Nickling, WG ;
King, J .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2002, 107 (D24) :XXIX-XXX
[10]   Drag reduction of flexible plates by reconfiguration [J].
Gosselin, Frederick ;
de Langre, Emmanuel ;
Machado-Almeida, Bruno A. .
JOURNAL OF FLUID MECHANICS, 2010, 650 :319-341
123