A STUDY ON APPLICABILITY OF HYDROSTATIC APPROXIMATION BASED ON NUMERICAL SIMULATIONS AND WAVE THEORIES
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- HASEBE Masanobu
- 清水建設株式会社 技術研究所
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- TABETA Shigeru
- 東京大学大学院 新領域創成科学研究科
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- WASEDA Takuji
- 東京大学大学院 新領域創成科学研究科
Bibliographic Information
- Other Title
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- 数値解析と波動理論に基づく静水圧近似の適用範囲に関する検討
- スウチ カイセキ ト ハドウ リロン ニ モトズク セイスイアツ キンジ ノ テキヨウ ハンイ ニ カンスル ケントウ
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Description
The applicability of hydrostatic approximation was studied by numerical simulations and theoretical speculations. By numerical simulations on tsunami propagation with soliton fission, it was found that the reproducibility of dispersive wave shape may be affected by horizontal grid size and non-hydrostatic pressure behind wave crest. Referring these results of numerical simulations, theoretical considerations were made based on theories about non-linier long-wave and finite amplitude wave. As a result, the conditions which can be applied hydrostatic approximation have been derived as δε<0.0087 and ε2<0.03 (here δ=Δz/Δx, ε=|w/u|) for numerical simulations on shallow water.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 72 (2), I_19-I_24, 2016
Japan Society of Civil Engineers