Investigation on A Resistance-Type Porosity Model and the Experimental Coefficients
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The mathematical model based on the Volume-Averaged/Reynolds-Averaged Navier—Stokes (VARANS) equations has been adopted in recent years to generally simulate the interaction between waves and porous structures. However, it is still hard to determine the two experimental coefficients (α and β) included in VARANS equations. In the present study, VARANS equation is adopted to describe the flow inside and outside the porous structures uniformly, with applying the volume averaged k − ε model to simulate the turbulence effect. A new calibration method is used to evaluate the accuracy of numerical simulation of wave motion on porous seabed with different coefficients, by taking the wave damping rate as an index. The calibration is achieved by completing a simulation matrix on two calibration cases. A region can be found in the parameter space to produce a lower error, which means that the simulation results are better consistent with the experimental results.
Key wordsporous media VARANS equations wave damping rate perforated caisson rubble-mound foundation
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- Chang, H.H., 2004. Interaction of Water Waves and Submerged Permeable Offshore Structures, Ph.D. thesis, The National Cheng Kung University, Taiwan, China.Google Scholar
- Engelund, F., 1953. On the Laminar and Turbulent Flows of Ground Water Through Homogeneous Sand, Danish Academy of Technical Sciences, Kopenhagen.Google Scholar
- Lara, J.L., Losada, I.J., del Jesus, M., Barajas, G. and Guanche, R., 2010. IH-3VOF: A three-dimensional Navier-Stokes model for wave and structure interaction, Proceedings of 32nd Conference on Coastal Engineering, ICCE, Shanghai, China, pp. 1–13.Google Scholar
- Savage, R.P., 1953. Laboratory Study of Wave Energy Losses by Bottom Friction and Percolation, Beach Erosion Board, Corps of Engineers.Google Scholar
- Sawaragi, T. and Deguchi, I., 1992. Waves on permeable layers, Proceedings of the 23rd Coastal Engineering Conference, ASCE, Venice, pp. 1531–1544.Google Scholar
- Van Gent, M.R.A., 1995. Wave Interaction with Permeable Coastal Structures, Ph.D. Thesis, Delft University of Technology, Delft.Google Scholar
- Wan, Q.Y., Lu, W. and Xia, Z.S., 2010. Experimental study on reflection coefficient of the perforated caisson on a low rubble bed, Science & Technology Association Forum, (5), 65–67. (in Chinese)Google Scholar