Small-scale turbulent diffusion is numerically simulated in relation to its time variability dependent on tidal current. From time series of 3D (3-dimensional) velocity and temperature measured at the depth of 2000 m, main constituents of internal tides are extracted. Wavenumbers of eddies, the scale of which is O (102) m, are determined by Taylor’s frozen eddy hypothesis with time-varying tidal speed taken as advection velocity. Large eddy simulation was applied to generate turbulence numerically by forcing the measured low-wavenumber components in the computational domain. The result shows that the energy dissipation rate varies in time, ranging from O (10−11) to O (10−7) m2 s−3. These values of energy dissipation correspond with vertical diffusivity of 10−6 to 10−4 m2 s−1 in this area, with temporal average value of 6.9 × 10−5 m2 s−1.
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25th International Conference on Offshore Mechanics and Arctic Engineering
June 4–9, 2006
Hamburg, Germany
Conference Sponsors:
- Ocean, Offshore, and Arctic Engineering Division
ISBN:
0-7918-4749-7
PROCEEDINGS PAPER
Numerical Simulation of Small-Scale Turbulent Diffusion for Injected CO2 in the Deep Ocean
Shinichiro Hirabayashi,
Shinichiro Hirabayashi
University of Tokyo, Tokyo, Japan
Search for other works by this author on:
Toru Sato
Toru Sato
University of Tokyo, Tokyo, Japan
Search for other works by this author on:
Shinichiro Hirabayashi
University of Tokyo, Tokyo, Japan
Toru Sato
University of Tokyo, Tokyo, Japan
Paper No:
OMAE2006-92304, pp. 447-451; 5 pages
Published Online:
October 2, 2008
Citation
Hirabayashi, S, & Sato, T. "Numerical Simulation of Small-Scale Turbulent Diffusion for Injected CO2 in the Deep Ocean." Proceedings of the 25th International Conference on Offshore Mechanics and Arctic Engineering. Volume 4: Terry Jones Pipeline Technology; Ocean Space Utilization; CFD and VIV Symposium. Hamburg, Germany. June 4–9, 2006. pp. 447-451. ASME. https://doi.org/10.1115/OMAE2006-92304
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