Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Numerical Analyses on the Formation, Propagation, and Deformation of Landslide Tsunami Using LS-DYNA and NWT

  • Seo, Minjang (Graduate Student, Department of Ocean Civil Engineering, Gyeongsang National University) ;
  • Yeom, Gyeong-Seon (General Manager, Civil Zero Defect Team, Civil Business Division, DL E&C) ;
  • Lee, Changmin (Graduate Student, Department of Ocean Civil Engineering, Gyeongsang National University) ;
  • Lee, Woo-Dong (Department of Ocean Civil Engineering, Gyeongsang National University)
  • Received : 2021.11.25
  • Accepted : 2022.01.17
  • Published : 2022.02.28
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Abstract

Generally, tsunamis are generated by the rapid crustal movements of the ocean floor. Other factors of tsunami generation include landslides on coastal and ocean floor slopes, glacier collapses, and meteorite collisions. In this study, two numerical analyses were conducted to examine the formation, propagation, and deformation properties of landslide tsunamis. First, LS-DYNA was adopted to simulate the formation and propagation processes of tsunamis generated by dropping rigid bodies. The generated tsunamis had smaller wave heights and wider waveforms during their propagation, and their waveforms and flow velocities resembled those of theoretical solitary waves after a certain distance. Second, after the formation of the landslide tsunami, a tsunami based on the solitary wave approximation theory was generated in a numerical wave tank (NWT) with a computational domain that considered the stability/steady phase. The comparison of two numerical analysis results over a certain distance indicated that the waveform and flow velocity were approximately equal, and the maximum wave pressures acting on the upright wall also exhibited similar distributions. Therefore, an effective numerical model such as LS-DYNA was necessary to analyze the formation and initial deformations of the landslide tsunami, while an NWT with the wave generation method based on the solitary wave approximation theory was sufficient above a certain distance.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No. NRF-2021R1A2C4002665).

References

  1. Brackbill, J.U., Kothe, D.B., & Zemach, C. (1992). A Continuum Method for Modeling Surface Tension. Journal of Computational Physics, 100, 335-354. https://doi.org/10.1016/0021-9991(92)90240-Y
  2. Brorsen, M., & Larsen, J. (1987). Source Generation of Nonlinear Gravity Waves with the Boundary Integral Equation Method. Coastal Engineering, 11, 93-113. https://doi.org/10.1016/0378-3839(87)90001-9
  3. Dean, R.G., & Dalrymple, R.A. (1984). Water Wave Mechanics for Engineers and Scientists. Englewood Cliffs, New Jersey, USA: Prentice-Hall.
  4. Di Risio, M. (2005). Landslide Generated Impulsive Waves: Generation, Propagation and Interaction with Plane Slopes - An Experimental and Analytical Study (Ph.D. Thesis). University of Roma.
  5. Germano, M., Piomelli, U., Moin, P., & Cabot, W.H. (1991). A Dynamic Subgrid-Scale Eddy Viscosity Model. Physics of Fluids, 3, 1760-1765. https://doi.org/10.1063/1.857955
  6. Heinrich, P. (1992). Nonlinear Water Waves Generated by Submarine and Aerial Landslides. Journal of Waterway, Port, Coastal, and Ocern Engineering, 118(3), 249-266. https://doi.org/10.1061/(ASCE)0733-950X(1992)118:3(249)
  7. Heller, V., Bruggemann, M., Spinneken, J., & Rogers, B.D. (2016). Composite Modelling of Subaerial Landslide-Tsunamis in Different Water Body Geometries and Novel Insight into Slide and Wave Kinematics. Coastal Engineering, 109, 20-41. https://doi.org/10.1016/j.coastaleng.2015.12.004
  8. Hirt, C.W., & Nichols, B.D. (1981). Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries. Journal of Computational Physics, 39(1), 201-225. https://doi.org/10.1016/0021-9991(81)90145-5
  9. Hunt, A. (2003). Extreme Waves, Overtopping and Flooding at Sea Defences (Ph.D. thesis). University of Oxford, the United Kingdom.
  10. Hur, D.S., Lee, K.H., & Choi, D.S. (2011). Effect of the Slope Gradient of Submerged Breakwaters on Wave Energy Dissipation. Engineering Applications of Computational Fluid Mechanics, 5(1), 83-98. https://doi.org/10.1080/19942060.2011.11015354
  11. Lee, W.D., Kim, J.O., & Hur, D.S. (2019). Effects of Waveform Distribution of Tsunami-Like Solitary Wave on Run-up on Impermeable Slope. Journal of Ocean Engineering and Technology, 33(1), 76-84. https://doi.org/10.26748/KSOE.2018.059
  12. Lee, W.D., Kim, J.O., Park, J.R., & Hur, D.S. (2018). Effect of Tsunami Waveform on Overtopping and Inundation on a Vertical Seawall. Journal of Korea Water Resources Association, 51(8), 643-654. https://doi.org/10.3741/JKWRA.2018.51.8.643
  13. Lee, W.D., Park, J,R., Jeon, H.S., & Hur, D.S. (2016). A Study on Stable Generation of Tsunami in Hydraulic/Numerical Wave Tank. Journal of the Korean Society of Civil Engineers, 36, 805-817. https://doi.org/10.12652/Ksce.2016.36.5.0805
  14. Lin, Y.N., Park, E., Wang, Y., Quek, Y.P., Lim, J., Alcantara, E., & Loc, H.H. (2021). The 2020 Hpakant Jade Mine Disaster, Myanmar: A Multi-Sensor Investigation for Slope Failure. ISPRS Journal of Photogrammetry and Remote Sensing, 177, 291-305. https://doi.org/10.1016/j.isprsjprs.2021.05.015
  15. Lindstrom, E.K. (2016). Waves Generated by Subaerial Slides with Various Porosities. Coastal Engineering, 116, 170-179. https://doi.org/10.1016/j.coastaleng.2016.07.001
  16. Lilly, D.K. (1992). A Proposed Modification of the Germano Subgrid-Scale Closure Method. Physics of Fluids, 4(3), 633-635. https://doi.org/10.1063/1.858280
  17. Massel, S.R., & Przyborska, A. (2013). Surface Wave Generation due to Glacier Calving. Oceanologia, 55(1), 101-127. https://doi.org/10.5697/oc.55-1.101
  18. Monaghan, J.J., & Kos, A. (2000). Scott Russell's Wave Generator. Physics of Fluids, 12(3), 622-630. https://doi.org/10.1063/1.870269
  19. Ohyama, T., & Nadaoka, K. (1991). Development of a Numerical Wave Tank for Analysis of Non-Linear and Irregular Wave Field. Fluid Dynamics Research, 8, 231-251. https://doi.org/10.1016/0169-5983(91)90045-K
  20. Poehlmann-Martins, F., Gabrys, J., & Souli, M. (2005). Hydrodynamic Ram Analysis of Non-Exploding Projectile Impacting Water. Proceedings of the ASME 2005 Pressure Vessels and Piping Conference, Denver, Colorado, USA, 267-273. https://doi.org/10.1115/PVP2005-71658
  21. Rzadkiewicz, S.A., Mariotti, C., & Heinrich, P. (1997). Numerical Simulation of Submarine Landslides and Their Hydraulic Effects. Journal of Waterway, Port, Coastal, and Ocean Engineering, 123(4), 149-157. https://doi.org/10.1061/(ASCE)0733-950X(1997)123:4(149)
  22. Santini, P., Palmieri, D., & Marchetti, M. (1998). Numerical Simulation of Fluid-Structure Interaction in Aircraft Fuel Tanks Subjected to Hydrodynamic Ram Penetration. In 21st ICAS Congress, Melbourne, Australia.
  23. Seddon, C., Moodie, K., Thyer, A., & Moatamedi, M. (2004). Preliminary Analysis of Fuel Tank Impact. International Journal of Crashworthiness, 9, 237-244. https://doi.org/10.1533/ijcr.2004.0277
  24. Smagorinsky, J. (1963). General Circulation Experiments with the Primitive Equation. Monthly Weather Review, 91(3), 99-164. https://doi.org/10.1175/1520-0493(1963)091<0099:GCEWTP>2.3.CO;2
  25. Souli, M., Ouahsine, A., & Lewin, L. (2000). ALE Formulation for Fluid-Structure Interaction Problems. Computer Methods in Applied Mechanics and Engineering, 190(5-7), 659-675. https://doi.org/10.1016/S0045-7825(99)00432-6
  26. Synolakis, C.E. (1987). The Run-Up of Solitary Waves. Journal of Fluid Mechanics, 185, 523-545. https://doi.org/10.1017/S0022112083003080
  27. von Hardenberg, W.G. (2011). Expecting Disaster: The 1963 Landslide of the Vajont Dam. Environment and Society Portal, Arcadia, 8. https://doi.org/10.5282/rcc/3401
  28. Xiao, L., Wang, J., Ward, S.N., & Chen, L. (2018). Numerical Modeling of the June, 2015, Hongyanzi Landslide Generated Impulse Waves in Three Gorges Reservoir, China. Landslides, 15(12), 2385-2398. https://doi.org/10.1007/s10346-018-1057-2
  29. Yeylaghi, S., Moa, B., Buckham, B., Oshkai, P., Vasquez, J., & Crawford, C. (2017). ISPH Modelling of Landslide Generated Waves for Rigid and Deformable Slides in Newtonian and Non-Newtonian Reservoir Fluids. Advances in Water Resources, 107, 212-232. https://doi.org/10.1016/j.advwatres.2017.06.013