FN Archimer Export Format
PT J
TI Mixing parameterization: Impacts on rip currents and wave set-up
BT 
AF BENNIS, Anne-claire
   DUMAS, Franck
   ARDHUIN, Fabrice
   BLANKE, Bruno
AS 1:1,2,3;2:2;3:4;4:3;
FF 1:;2:PDG-ODE-DYNECO-PHYSED;3:PDG-ODE-LOS;4:;
C1 CNRS UCBN UR, UMR 6143, M2C, F-14000 Caen, France.
   IFREMER, DYNECO PHYSED, F-29280 Plouzane, France.
   CNRS Ifremer IRD UBO, UMR 6523, LPO, F-29200 Brest, France.
   IFREMER, LOS, F-29280 Plouzane, France.
C2 UNIV CAEN, FRANCE
   IFREMER, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
SI AUTRE
   BREST
SE PDG-ODE-DYNECO-PHYSED
   PDG-ODE-LOS
   PDG-ODE-LPO
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.351
TC 12
UR https://archimer.ifremer.fr/doc/00188/29970/28482.pdf
LA English
DT Article
DE ;Bottom friction;Vertical mixing;Wave set-up;Nearshore processes
AB Wave set-up is often underestimated by the models (e.g. Raubenheimer et al., 2001). Our paper discusses how the wave set-up may be changed by the inclusion of turbulent mixing in the bottom shear stress. The parameterization developed in Mellor (2002) for phase-averaged oscillatory boundary layer is used for this purpose. Two studies are carried out. The dependence of the parameterization on the vertical discretization and on the magnitude of the near-bottom wave orbital velocity is investigated. The function that distributes the turbulent terms over the vertical is modified, giving a good agreement with the average of the phase-resolved velocities, but an overestimation of the turbulent phase-resolved velocities. Applying that parameterization to simulate laboratory conditions in the presence of rip currents gives accurate magnitudes of the rip velocity, particularly in a fully coupled wave–current configuration, with an RMS error of about 4%. Compared to a model using the more standard Soulsby (1995) parameterization, the wave set-up is increased by about 12% when using the alternative parameterization. Thus the bottom shear stress is sensitive to the mixing parameterization with a possible effect of turbulence on the wave set-up. Further measurement and parameterization efforts are necessary for practical applications.
PY 2014
PD JUN
SO Ocean Engineering
SN 0029-8018
PU Pergamon-elsevier Science Ltd
VL 84
UT 000338004800022
BP 213
EP 227
DI 10.1016/j.oceaneng.2014.04.021
ID 29970
ER

EF