2026-10-14T18:13:53Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34022216 2026-09-29T09:06:52Z category_915 category_7 category_15 category_16 category_39 category_931 category_61 category_69 category_132 category_133 portal_87 item_type_3 month_year_09_2026

Experimental study of the flow in and above very flexible vegetation Louis Vallier (25136213) Ludovic Cassan (25136216) Frédéric Y. Moulin (25136219) Physical Sciences not elsewhere classified Medicine Neuroscience Physiology Ecology Information Systems not elsewhere classified Developmental Biology Inorganic Chemistry Infectious Diseases Plant Biology Double-averaging flexible vegetation logarithmic law plant–flow interactions rough-wall boundary layers <p>Optical measurements were performed in an open-channel tilting flume filled with vegetation surrogates in regimes of strong deformation at high values of the Cauchy number, Ca, in [1720;22766]. Multi-plane telecentric 2D particle image velocimetry (PIV) measurements gave access to flow components both above and inside the vegetation. We show that the canopy layer separates into two distinct sub-layers. In the lower part, the wake sub-layer, located below the maximum vegetation density height hν, vegetation behaves as a simply reconfigured canopy, hν decreasing with Ca following laws found for flexible canopies. Above hν, a flapping sub-layer appears, whose upper boundary hc scales with the water depth <i>H</i>. There, vegetation band excursions homogenize the mean velocity field, erasing all dispersive terms, and profiles of the double-averaged longitudinal velocity follow a log law, as in sparse vegetation canopies, with an inflection point in the velocity profiles found just above hν.</p> 2026-09-29T09:06:52Z Dataset Dataset 10.6084/m9.figshare.34022216.v1 https://figshare.com/articles/dataset/Experimental_study_of_the_flow_in_and_above_very_flexible_vegetation/34022216 CC BY 4.0