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- 内山 雄介
- 神戸大学
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- McWilliams James C.
- カリフォルニア大学ロサンゼルス校
書誌事項
- タイトル別名
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- Three-dimensional Unstable Littoral Currents Analyzed with An Eulerian Phase-averaged Primitive Equation Based on A Vortex Force Formalism
- Vortex-force オ モチイタ オイラーカタ イソウ ヘイキン プリミティブ ホウテイシキ ニ ヨル カイヒンリュウ ノ 3ジゲン カイセキ
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Littoral flows are analyzed with an Eulerian-averaged primitive equation for slowly-evolving oceanic flows based on a vortex-force formalism coupled with a WKB spectrum-peak wave model (ROMS-WEC; Uchiyama et al., 2010). Two surf zone problems on a realistic topography are analyzed: 1) shear instability associated with longshore currents driven by obliquely incident waves, and 2) normal mode instability of offshore-directed rip currents under a near-normal incident condition. The coupled wave-current model successfully reproduces 3-D shear waves during the SandyDuck field measurement. We found in 3-D rip-induced coherent eddies that littoral currents have significant depth dependency leading to vorticity stretching/titling effects and to faster decay of enstrophy and kinetic energy than 2-D rip eddies.
収録刊行物
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- 土木学会論文集B2(海岸工学)
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土木学会論文集B2(海岸工学) 67 (2), I_96-I_100, 2011
公益社団法人 土木学会
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詳細情報 詳細情報について
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- CRID
- 1390282680298219776
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- NII論文ID
- 120005670617
- 130004550628
- 40019130786
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- NII書誌ID
- AA12508551
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- ISSN
- 18838944
- 18842399
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- HANDLE
- 20.500.14094/90002926
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- NDL書誌ID
- 023373312
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
- NDL
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- 使用不可