On the scaling of drag reduction by reconfiguration in plants

Emmanuel de Langre 1 Alvaro Gutierrez 1, 2 Julia Cossé 1, 3
1 LadHyX - Laboratoire d'hydrodynamique
2 UPM - Universidad Politécnica de Madrid
3 CALTECH - California Institute of Technology
Abstract : 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. © 2011 Académie des sciences.
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Submitted on : Monday, May 26, 2014 - 11:22:36 AM
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Emmanuel de Langre, Alvaro Gutierrez, Julia Cossé. On the scaling of drag reduction by reconfiguration in plants. Comptes Rendus Mécanique, Elsevier Masson, 2012, 340 (1-2), pp.35-40. ⟨10.1016/j.crme.2011.11.005⟩. ⟨hal-00994485⟩

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