WIT Press

Evaluation Of M-Y Closure Model In Tidal Estuary With Turbulence Data From High-resolution Current Profiler

Price

Free (open access)

Paper DOI

10.2495/CE030111

Volume

70

Pages

10

Published

2003

Size

563.46 kb

Author(s)

K. Kawanisi

Abstract

Evaluation of M-Y closure model in tidal estuary with turbulence data from high-resolution current profiler K. Kawanisi Department of Civil and Environmental Engineering, Graduate School of Engineering, Hiroshima University, Japan Abstract A high-resolution current profiler (HRCP), which belongs to a pulse-topulse coherent Doppler sonar, has been used to measure accurate vertical profiles of turbulence parameters, such as the Reynolds stresses, eddy viscosity, production and dissipation rates, etc., and to test the parameterization of dissipation rate and eddy viscosity. The HRCP and automatic ascendingldescending CTD are deployed in a tidal shallow estuary. The current near the bed during the ebb tide is smaller than during the flood tide. Thus, the bed-generated turbulence during the ebb is weak compared with that during the flood. The velocity profiles are almost linear during the ebb, whereas the profiles fit to a logarithmic form during the flood. The rate of TKE production is not balanc

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