Abstract
Lattice Boltzmann Method (LBM) is one of the new, robust and efficient Computational Fluid Dynamics (CFD) solvers. One of the key features of LBM is that implementation in parallel computing is more efficient compared with the other conventional CFD solvers. In the current study, we developed a novel Tsunami simulation model applying Impedance boundary condition for offshore non-reflecting boundary to Subgrid-scale LBM based on Shallow Water Equations. The model was tested in the benchmark with solitary wave incident waves. As a result, the model can reduce amount of wave reflection compared with the conventional non-reflective boundary condition based on linear long-wave approximation in the Finite Difference Method. Through the model verification, we found that Impedance boundary condition has a sufficient accuracy for Tsunami offshore non-reflecting boundary condition.
