Drag Reduction Effect and Wettability of Surface with Dual-Length Micro-Pillars

• HASEGAWA Masato

  Kanazawa University

• NITTA Shinjiro

  Kanazawa University

• UENO Hisanori

  Kanazawa University

抄録

We studied the drag reduction effect and wettability of surfaces with microscale cylindrical pillars. As the ideal surface that satisfies these two antinomy conditions, improvement of drag reduction effect and maintenance of air layer, we propose the microstructured surface with dual length pillars. Pillars are partly made shorter (a half of original ones) so that the pillars are arranged densely while the liquid solid contact at the tip of pillars is reduced. Test surfaces with dual-length pillars demonstrated greater drag reduction (over 10%) compared to a surface with uniform length pillars. We also examined the temporal variation of area of air layer retained on the tested surface that was exposed to water with or without flow. The dual-length pillar surface demonstrated better durability against wetting compared to that without short pillars.

収録刊行物

• Journal of Fluid Science and Technology

  Journal of Fluid Science and Technology 4 (3), 614-622, 2009

  一般社団法人 日本機械学会

キーワード

• Drag Reduction
• Highly Water-Repellent Wall
• Microscale Structure

詳細情報

• CRID: 1390001205244546432
• NII論文ID: 130000129115
• DOI: 10.1299/jfst.4.614
• BIBCODE: 2009JFST....4..614H
• ISSN: 18805558
• Web Site: http://www.jstage.jst.go.jp/article/jfst/4/3/4_3_614/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可