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Lattice Boltzmann method for simulating impulsive water waves generated by landslides

Pak, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. Impulsive water waves generated by landslides impose severe damage on coastal areas. Very large mass ows in the ocean can generate catastrophic tsunamis. Preventing damage to dams and coastal structures, and saving the lives of local people against landslide-generated waves, has become an increasingly important issue in recent years. Numerical modeling of landslide-generated waves is a challenging subject in CFD. The reason lies in the difficulty of determining the interaction between the moving solids and sea water, which causes complicated turbulent regimes around the moving mass and at the water surface. Submarine or aerial types of landslide can further complicate the problem. Up to now, a number of numerical approaches have been proposed for predicting the behavior of flow during and after mass movement. In this study, a Lattice Boltzmann Method (LBM) based-code is employed for analyzing and simulating the impulsive water waves generated by landslides. Four experimental cases of submerged and aerial landslides have been modeled to investigate the efficiency and accuracy of the LBM code, and the obtained results are verified against experimental observations. The results indicate the capability of LBM in simulating complicated flow fields and demonstrate its superiority over numerical methods used so far, such as SPH and RANS
  4. Keywords:
  5. Impulsive water waves ; Numerical modeling ; Surface waters ; Coastal structures ; Complicated flow ; Landslide-generated waves ; Lattice boltzmann methods (LBM) ; Numerical approaches ; Turbulent regime ; Computational fluid dynamics ; Free surface flow ; Landslide ; Mass movement ; Numerical model ; Seawater ; Submarine ; Water wave
  6. Source: Scientia Iranica ; Vol. 21, issue. 2 , 2014 , p. 318-328 ; 1026-3098
  7. URL: http://www.scientiairanica.com/en/ManuscriptDetail?mid=140