Effect of pinning of contact line on sliding friction by liquid bridge

• Project/Area Number: 25820033
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Design engineering/Machine functional elements/Tribology
• Research Institution: Tokyo University of Marine Science and Technology
• Principal Investigator: TANAKA Kentaro 東京海洋大学, 海洋科学技術研究科, 准教授 (60359693)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
• Keywords: トライボロジー / 表面・界面張力 / 濡れ / 表面・界面物性 / マイクロマシン / 液体架橋 / 濡れ性 / 接触角 / 接触線 / すべり

Outline of Final Research Achievements

We focused on a pinning effect of contact line on sliding friction by liquid bridge. A force during sheared process of a liquid bridge between parallel plates was measured. Behavior of contact lines was also observed.
Combination of rougher surfaces results in larger pinning effect and larger sliding friction. We also found that slippage at liquid-solid interface is initiated by inertial effect. Roughness on the non-driving plate has larger effect on sliding force.

Research Products

• [Presentation] Slippage at Liquid Solid Interface of Sheared Liquid Bridge (2015)
  • Author(s): Kentaro Tanaka, Katsumi Iwamoto
  • Organizer: International Tribology Conference 2015
  • Place of Presentation: Tokyo
  • Year and Date: 2015-09-16 – 2015-09-20
• [Presentation] Sliding Friction by a Liquid Meniscus Bridge (2014)
  • Author(s): Kentaro Tanaka, Katsumi Iwamoto
  • Organizer: The 5th Advanced Forum on Tribology(日中先端トライボロジーフォーラム）
  • Place of Presentation: 富士
  • Year and Date: 2014-04-14
  • Invited
• [Presentation] Sliding Friction by a Liquid Meniscus Bridge
  • Author(s): Kentaro Tanaka, Katusmi Iwamoto
  • Organizer: The 5th Advanced Forum on Tribology(日中先端トライボロジーフォーラム）
  • Place of Presentation: 富士
  • Invited
• [Presentation] 平行平板間の液体架橋によるすべり摩擦 -接触線のピン止めと架橋の変形-
  • Author(s): 田中健太郎，岩本勝美
  • Organizer: トライボロジー会議
  • Place of Presentation: 福岡
• [Presentation] Sliding Friction by a Liquid Meniscus Bridge between Parallel Plates
  • Author(s): Kentaro Tanaka, Katsumi Iwamoto
  • Organizer: 40th Leeds-Lyon Symposium
  • Place of Presentation: Lyon, France
• [Presentation] 数値シミュレーションにおいて濡れをどう扱うか
  • Author(s): 田中健太郎
  • Organizer: トライボロジー会議
  • Place of Presentation: 東京
  • Invited
• [Remarks] 東京海洋大学・機械設計研究室ホームページ
  • URL: http://www2.kaiyodai.ac.jp/~kentaro/