Analysis of water waves due to landslide by CIVA-stabilized finite element method

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  • ＣＩＶＡ―安定化有限要素法による地すべりを起因とする造波解析
  • CIVA アンテイカ ユウゲン ヨウソホウ ニ ヨル ジスベリ オ キイン ト スル ゾウハ カイセキ

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Abstract

Landslide mass inflowing into a reservoir or a bay causes giant wave that brings a greatly serious disaster. The numerical analysis of FEM (Finite Element Method) has been discussed for the shallow water equation to predict the wave's quality. The numerical method of FEM gives rise of the local oscillation due to the convection term. The FEM of SUPG (Streamline Upwind/Petrov-Galerkin formulation) applied the interpolation function of first order accuracy is discussed to avoid the local oscillations. This paper examines the stabilized FEM of CIVA (Cubic Interpolation Volume/Area Coordinate) method that uses the interpolate function of the third order accuracy in order to more raise the precision. The presented method is compared with the results of previous model experiment and confirms the validity of numerical analysis.

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