FN Archimer Export Format PT J TI Experimental study of the near-field impact of an oyster table on the flow BT AF KERVELLA, Youen GERMAIN, Gregory GAURIER, Benoit FACQ, Jean-Valery CAYOCCA, Florence LESUEUR, Patrick AS 1:1,3;2:2;3:2;4:2;5:1;6:3; FF 1:PDG-DOP-DCB-DYNECO-PHYSED;2:PDG-DOP-DCB-RDT-HO;3:PDG-DOP-DCB-RDT-HO;4:PDG-DOP-DCB-RDT-HO;5:PDG-DOP-DCB-DYNECO-PHYSED;6:; C1 IFREMER, DYNECO, PHYSED, Ctr Brest, F-29280 Plouzane, France. IFREMER, ERT HO, Ctr Boulogne, F-62321 Boulogne Sur Mer, France. Univ Caen Basse Normandie, Lab M2C, CNRS, INSU,UMR 6143, F-14000 Caen, France. C2 IFREMER, FRANCE IFREMER, FRANCE UNIV CAEN, FRANCE SI BREST BOULOGNE SE PDG-DOP-DCB-DYNECO-PHYSED PDG-DOP-DCB-RDT-HO IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 1.068 TC 10 UR https://archimer.ifremer.fr/doc/2010/publication-7389.pdf LA English DT Article DE ;Sediment dynamics;Roughness length;Boundary layer;Particle Image Velocimetry;Laser Doppler Velocimetry;Flume;Oyster table AB Oyster farming structures are artificial obstacles which disturb tidal flow and wave propagation. These effects can induce modifications of erosion and sedimentation patterns, turbidity changes, local silting up and can be threatening for the shellfish farming itself. The understanding of the impact of these structures in terms of hydrodynamics and sediment dynamics in the far-field, i.e. at the scale of a bay, is a very challenging task. In order to investigate the far-field impact, it is very important to understand in the first place all the changes which occur at a smaller scale, i.e. at the scale of a single table for a farm consisting of oyster tables made of metallic wire structures on which porous bags of oysters are laid. This work is carried out through the idealized representation of the in-situ flow in a free surface flume tank. The flow characteristics around the overall structure are determined from velocity measurements obtained by laser velocimetry. The results highlight an asymmetric development of the boundary layers which suggest the existence of preferential areas for silting up and suspended matter fragmentation under the table. (C) 2009 Elsevier Masson SAS. All rights reserved. PY 2010 SO European Journal of Mechanics - B/Fluids SN 0997-7546 PU Elsevier VL 29 IS 1 UT 000272928900004 BP 32 EP 42 DI 10.1016/j.euromechflu.2009.09.002 ID 7389 ER EF