Tidal Vortexによって生成される潮汐残差環流

• 柏井 誠

  京都大学農学部水産学教室

書誌事項

タイトル別名

• Tidal residual circulation produced by a tidal vortex. part 2. Vorticity balance and kinetic energy.
• Tidal residual circulation produced by a tidal vortex
• Part 2. Vorticity Balance and Kinetic Energy

抄録

The role of the ‘tidal vortex’ in the mechanism of generation of tidal residualcirculation is investigated for a bay with a narrow entrance channel. It is shown that thecirculation of residual flow is produced not by the vorticity of the inflowing sidewall-boundarylayer, but by a tidal vortex formed by rolling up of the discontinuity surface released fromthe flow separation point at the entrance. This tidal vortex is affected by the circulation ofthe inflowing water, that is the inflowing tidal vortex. A returning tidal vortex formed inthe bay diminishes the circulation of the tidal vortex of the next generation, while theinflowing tidal vortex formed in the open sea increases it. These cases correspond to tidalvortex life-histories of type-II and type-III, respectively (Kashiwai, 1984a). Tidal vortices ofeach life-history type have different strength and produce residual circulation of differentstrength, corresponding to each type. The ratio of kinetic energy of residual flow to that ofthe tidal current through the bay entrance, that is to say the energy gain of the residualcirculation, is proportional to the reciprocal of the Strouhal number, and its rate of increasedepends on the life-history type of the tidal vortex. This explains the experimental observationreported by Oonishi (1977) and Yanagi (1978) that the energy ratio of residual flowto tidal flow increases with the Reynolds number not monotonously but goes through a maximumand a minimum at intermediate Reynolds number.

収録刊行物

• 日本海洋学会誌

  日本海洋学会誌 40 (6), 437-444, 1984

  日本海洋学会

キーワード

• Oceanography
• General Earth and Planetary Sciences
• Earth-Surface Processes
• General Engineering
• Soil Science
• General Environmental Science

詳細情報

• CRID: 1390282681541641600
• NII論文ID: 30018375308
• NII論文ID: 130004053553
• NII書誌ID: AN00354918
• DOI: 10.1007/bf02303071
• ISSN: 21863113
• ISSN: 1573868X
• ISSN: 00298131
• Web Site: http://link.springer.com/content/pdf/10.1007/BF02303071.pdf
• Web Site: http://link.springer.com/article/10.1007/BF02303071/fulltext.html
• Web Site: http://link.springer.com/content/pdf/10.1007/BF02303071
• 本文言語コード: en
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