DEVELOPMENT OF FLUID-SEDIMENT-SEABED INTERACTION MODEL AND ITS APPLICATION

Tomoaki Nakamura, Norimi Mizutani

Abstract


To provide a computational framework for simulating fluid-sediment-seabed interactions, a three-dimensional coupled fluid-sediment-seabed interaction model was developed and applied to seabed response under regular waves and local scouring from tsunami run-up. For the seabed response under the regular waves, the validity of the model was verified from comparison with an analytical solution. For the seabed response under the tsunami-induced local scouring, numerical results showed that the model had sufficient computational capability to simulate the seabed response during the onset of the local scouring, and suggested that the model is a useful tool for analyzing and evaluating a general complex fluid-sediment-seabed interaction phenomenon in a marine environment.

Keywords


fluid-sediment-seabed interaction; numerical model; finite element method; coupling scheme; tsunami-induced local scouring

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References


Bear, J. 1972. Dynamics of Fluids in Porous Media, American Elsevier Pub. Co., New York, 764 p.

Jiang, Q., S. Takahashi, Y. Muranishi, and M. Isobe. 2000. A VOF-FEM model for the interaction among waves, soils and structures, Proceedings of Coastal Engineering, JSCE, 47, 51-55 (in Japanese).

Kunugi, T. 2000. MARS for multiphase calculation, Computational Fluid Dynamics Journal, 9(1), 1-10.

Lee, K. H., and N. Mizutani. 2006. Local scour near a vertical submerged breakwater and development of its time domain analysis, Annual Journal of Coastal Engineering, JSCE, 53, 501-505 (in Japanese).

Liu, X., and M. H. García. 2008. Three-dimensional numerical model with free water surface and mesh deformation for local sediment scour, Journal of Waterway, Port, Coastal, and Ocean Engineering, ASCE, 134(4), 203-217.

Mizutani, N., W. G. McDougal, and A. M. Mostafa. 1996. BEM-FEM combined analysis of nonlinear interaction between wave and submerged breakwater, Proceedings of 25th International Conference on Coastal Engineering, ASCE, Orlando, FL, 2377-2390.

Nakamura, T., Y. Kuramitsu, and N. Mizutani. 2008. Tsunami scour around a square structure, Coastal Engineering Journal, JSCE, 50(2), 209-246.

Nakamura, T., and S. C. Yim. 2011. A nonlinear three-dimensional coupled fluid-sediment interaction model for large seabed deformation, Journal of Offshore Mechanics and Arctic Engineering, ASME, 133(3), 031103-1-031103-14.

Nakamura, T., and N. Mizutani. 2012. Sediment transport model considering pore-water pressure in surface layer of seabed and its application to local scouring due to tsunami, Journal of Japan Society of Civil Engineers, Series B2 (Coastal Engineering), JSCE, 68(2), I_216-I_220 (in Japanese).

Sandhu, R. S., and E. L. Wilson. 1969. Finite element analysis of seepage in elastic media, Journal of the Engineering Mechanics Division, ASCE, 95, EM3, 641-652.

Takahashi, S., K. Suzuki, Y. Muranishi, and M. Isobe. 2002. U-π form VOF-FEM program simulating wave-soil interaction: CADMAS-GEO-SURF, Proceedings of Coastal Engineering, JSCE, 49, 881-885 (in Japanese).

Tonkin, S., H. Yeh, F. Kato, and S. Sato. 2003. Tsunami scour around a cylinder, Journal of Fluid Mechanics, 496, 165-192.

Yamamoto, T. 1977. Wave induced instability in seabeds, Proceeding of Coastal Sediments ’77, ASCE, 898-913.




DOI: https://doi.org/10.9753/icce.v34.sediment.85