FN Archimer Export Format
PT J
TI Turbulence measurements: An assessment of Acoustic Doppler Current Profiler accuracy in rough environment
BT 
AF Mercier, Philippe
   Thiébaut, Maxime
   Guillou, Sylvain
   Maisondieu, Christophe
   Poizot, Emmanuel
   Pieterse, Aline
   Thiébot, Jérôme
   Filipot, Jean-Francois
   Grondeau, Mikaël
AS 1:1;2:2;3:1;4:3;5:1,4;6:2,3;7:1;8:2;9:1;
FF 1:;2:;3:;4:PDG-REM-RDT-LCSM;5:;6:PDG-REM-RDT-LCSM;7:;8:;9:;
C1 Normandie Université, UNICAEN LUSAC, EA 4253, 60 rue Max Pol Fouchet, CS 20082, 50130 Cherbourg-en-Cotentin, France
   France Energies Marines, 525 avenue Alexis de Rochon, 29280 Plouzané, France
   Institut Français de Recherche pour l’Exploitation de la Mer, 1625 route de Sainte-Anne CS 10070, 29280 Plouzané, France
   Cnam-Intechmer, Boulevard de Collignon, 50110 Cherbourg-en-Cotentin, France
C2 UNIV NORMANDIE, FRANCE
   FRANCE ENERGIES MARINES, FRANCE
   IFREMER, FRANCE
   INTECHMER CNAM, FRANCE
SI BREST
SE PDG-REM-RDT-LCSM
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
IF 4.372
TC 11
UR https://archimer.ifremer.fr/doc/00685/79745/83837.pdf
LA English
DT Article
DE ;Turbulence;Lattice Boltzmann Method;Large-Eddy Simulation;ADCP;Environmental flows
AB The deployment of tidal turbines requires a precise hydrodynamic characterisation of the production site. Acoustic Doppler Current Profilers (ADCP), usually employed for measuring the time-mean characteristics of environmental flows, could also be used for assessing the main features of turbulence. ADCP measurements are sensitive to many sources of uncertainties associated mainly with the spreading of the beams or the assumptions made on flow homogeneity. The ability of ADCPs to accurately measure the hydrodynamic parameters of a given flow can be tested on a synthetic dataset. However, it is difficult to generate a dataset representative of a real environmental flow. In this work, large-eddy simulation of a high Reynolds flow over a rough seabed is performed and used to assess the accuracy of two, coupled, 4-beam ADCP systems forming an 8-beam arrangement. The study confirms the relevance and efficiency of the tested 8-beam configuration for the characterisation of turbulence. The results near the seabed are of a lower quality, with up to 50 % error on the Reynolds stresses for elevations under twice the roughness height, which questions the interpretation of ADCP measurements in the lower part of the water column. Also, the spatial averaging over ADCP cells leads to an underestimation of the turbulence intensity of 10 % to 20 %. 
PY 2021
PD APR
SO Ocean Engineering
SN 0029-8018
PU Elsevier BV
VL 226
UT 000636753800015
DI 10.1016/j.oceaneng.2021.108819
ID 79745
ER

EF