High-speed and accurate simulations of landslide-generated tsunamis are of great\nimportance for the understanding of generation and propagation of water waves and for prediction\nof these natural disasters. A three-dimensional numerical model, based on Reynolds-averaged\nNavierâ??Stokes equations, is developed to simulate the landslide-generated tsunami. Available\nexperiment data is used to validate the numerical model and to investigate the scale effect of\nnumerical model according to the Froude similarity criterion. Based on grid convergence index\n(GCI) analysis, fourteen cases are arranged to study the sensitivity of numerical results to mesh\nresolution. Results show that numerical results are more sensitive to mesh resolution in near field\nthan that in the propagation field. Nonuniform meshes can be used to balance the computational\nefficiency and accuracy. A mesh generation strategy is proposed and validated, achieving an accurate\nprediction and nearly 22 times reduction of computational cost. Further, this strategy of mesh\ngeneration is applied to simulate the Laxiwa Reservoir landslide tsunami. The results of this study\nprovide an important guide for the establishment of a numerical model of the real-world problem of\nlandslide tsunami.
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