Fluid measurement theory and similarity law at the mesoscale between molecules and continuum

2017 Fiscal Year Final Research Report

• Project/Area Number: 26709008
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Tokyo University of Agriculture and Technology (2015-2017); Osaka University (2014)
• Principal Investigator: Hanasaki Itsuo 東京農工大学, 工学(系)研究科(研究院), 特任准教授 (10446734)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: ペクレ数 / 散乱光 / メゾスケール / 導電性インク / ナノ粒子 / ナノペーパー / セルロース / ナノファイバー

Outline of Final Research Achievements

We focused on the fluid-related phenomena at the mesoscale between the molecular theory and continuum. We have developed several techniques of measurement data analysis typically obtained from microscopy, where Brownian particles are suspended in fluid. In particular, we have enabled distinction of mixed data of displacements originating from partial adsorption or confused tracking. Furthermore, we developed a novel technique that enables the quantitative evaluation of diffusion field just like velocity field in the PIV analysis. On the other hand, we have also revealed a universal property in the transport of Brownian particles with spherical symmetry through a channel with the height similar to the particle diameter. This is not predicted from macroscopic theories of fluid mechanics, but it can also be described in terms of (the inverse of) Peclet number. We have also shown several case studies where mesoscale dynamics is of fundamental importance in the engineering applications.

Free Research Field

統計力学と力学系の視点による応用力学を通じて拡張された機械工学