Reduction of inlet and flow resistance of microchannel by microstructure capable of controlling gas-liquid interface

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05801
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: Ogata Satoshi 首都大学東京, 理工学研究科, 准教授 (50315751)
• Co-Investigator(Kenkyū-buntansha): 山本 憲 東京理科大学, 工学部機械工学科, 助教 (70749100)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 抵抗低減 / 疎水性 / 親水性 / 濡れ性 / 微細構造

Outline of Final Research Achievements

We investigated the effect of the surface microstructure on inlet and flow resistance of microchannel in order to create wall surfaces that can control the resistance. Experimental results revealed the following. Flow Visualization results showed that triplet lines and gas-liquid interface behaviors greatly changed due to the shape and dimension of microstructure and wettability. These behaviors were roughly divided into four patterns, which pattern was determined by the mean flow, the velocity of the triplet line, and the shape of microstructure. We proposed a new method of transporting sediment particles by using the unsteadiness of the triple lines on the hydrophobic surface. By using a wall with a fine hydrophilic network structure, laminar drag reduction was obtained.

Free Research Field

流体工学