Finite element analysis of tidal current in Ariake Sea using bubble function element

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  • 気泡関数要素を用いた有明海潮流の有限要素解析
  • キホウ カンスウ ヨウソ オ モチイタ アリアケカイ チョウリュウ ノ ユウゲン ヨウソ カイセキ

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Abstract

The selective lumping scheme has been commonly used in the FEM analysis of tidal currents. The scheme is enable to get the numerical solution fastly and stably, despite it causes dull results because of introducing heavy artificial diffusion. A combination of the elements which satisfy the inf-sup condition should be used to modify the finite element analysis of tidal currents. In this paper, the finite element model in which employed the bubble-function element was developed and the analysis of tidal current in Ariake sea was carried out for the evaluation of the model. The analysis results were in good agreement with for the observed ones the tide levels and harmonic constants of tidal current.

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