A PRECISE TSUNAMI NUMERICAL ANALYSIS OF LATTICE BOLTZMANN METHOD FOCUSING ON THE EXTERNAL FORCE TERM

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  • 外力項に着目した格子ボルツマン法による津波数値計算の高精度化に関する研究

Abstract

 Lattice Boltzmann Method (LBM) is the one of the new and efficient Computational Fluid Dynamics (CFD) solvers. It has become an alternative powerful method compared with the other conventional CFD solvers. In the current study, we developed a robust tsunami simulation model by applying enhanced LBM for shallow water equations with treatments of the bed slope in the external force term in the Lattice Boltzmann equation.<br> The proposed model is verified by the comparison with the conventional tsunami numerical model which is based on the Finite Difference Method (FDM). As a result, LBM results are in good agreement with the FDM results. The results imply that LBM based on shallow water equations has sufficient applicability of tsunami propagation and inundation.

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