Air Pressure Distribution above Wind Waves computed from PIV Measurement Data

• MIZUTANI Natsuki

  Osaka Sangyo University

• KAJI Masahiro

  Nakai Engineering Co., Ltd.

• MIYAJIMA Masahiro

  Osaka Sangyo University

Bibliographic Information

Other Title

• PIV計測データに基づいた風波波面上の気流の圧力分布
• PIV ケイソク データ ニ モトズイタ フウハ ハメン ジョウ ノ キリュウ ノ アツリョク ブンプ

Abstract

The 2D-PIV measurements were conducted to obtain air flow distributions above wind waves. Poisson equation was solved numerically to compute air pressure distributions by using the PIV measurement data. Low pressure distributions, less than 1013hPa, appear over a wave crest. High speed air flow over a wave crest makes air pressure decrease. Separation vortices on leeward surface also have low pressure values. The form drag was calculated by integrating of horizontal component of pressure resistance along wave surface. The frictional drag also was calculated in a similar way, using frictional resistance. The form drag is one order larger than the frictional drag. However, the averaged value of form drag is nearly equal to zero.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 69 (2), I_1401-I_1405, 2013

  Japan Society of Civil Engineers

Keywords

• wind wave
• air pressure distribution
• PIV
• form drag
• frictional drag

Details

• CRID: 1390001205319523712
• NII Article ID: 130004551032
• NII Book ID: AA12508551
• DOI: 10.2208/kaigan.69.i_1401
• ISSN: 18838944
• ISSN: 18842399
• NDL BIB ID: 025025321
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025025321
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed