TY - JOUR T1 - Phase-averaged mean properties of turbulent flow developing around a fluttering sheet of net A1 - Bouhoubeiny,Elkhadim A1 - Druault,Philippe A1 - Germain,Gregory AD - IFREMER, Marine Struct Lab, F-62321 Boulogne Sur Mer, France. AD - Univ Paris 06, UMR 7190, Inst Jean Le Rond dAlembert, F-75252 Paris 5, France. AD - CNRS, UMR 7190, Inst Jean Le Rond dAlembert, F-75252 Paris 5, France. UR - https://doi.org/10.1016/j.oceaneng.2014.03.009 DO - 10.1016/j.oceaneng.2014.03.009 KW - Fishing net structure KW - Hydrodynamics KW - PIV KW - Turbulent boundary layer flow N2 - Time-Resolved Particle Image Velocimetry (PIV) measurements are performed to investigate the hydrodynamic flow interaction with a representative piece of fishing net structure. Using the advanced post-processing mathematical tool based on Proper Orthogonal Decomposition, the phase averaged mean properties of turbulent flows are extracted from PIV database, demonstrating the existence of a Turbulent Boundary Layer (TBL) flow developing all around the sheet of net. The results also show that the mesh opening and so the turbulent flow passing through the structure are strongly influenced by the structure oscillations. This work allows us to demonstrate that the drag computation of fishing gear, commonly based on uniform velocity, needs to consider not only the local velocity deficit near the horizontal part of the net but also the instantaneous oscillations of the sheet of net. Y1 - 2014/05 PB - Pergamon-elsevier Science Ltd JF - Ocean Engineering SN - 0029-8018 VL - 82 SP - 160 EP - 168 ID - 29552 ER -