Experimental study on the fingering instability on an incline with two-dimensional measurement techniique for film surface geometry

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420113
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Nagoya University
• Principal Investigator: Ito Takahiro 名古屋大学, 工学(系)研究科(研究院), 准教授 (00345951)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 界面 / 接触角 / 接触線 / 指状 / 光学測定

Outline of Final Research Achievements

In this study, Color Coding Method, a simultaneous two-dimensional measurement system for the surface geometry of liquid film, was developed and applied for the investigation of the evolution process of the contact line of a liquid film falling down on an incline. It is shown that the contact slope parameter scaled by Ca number, previously proposed based on the numerical simulation, is applicable also to the present experimental condition. The formed shape of the contact line was found to be affected by film thickness at the root region of the wavy contact line, which depends on the contact slope and the Ca number.

Free Research Field

流体工学