2013 Fiscal Year Final Research Report

Liquid-vapor interface specificity of nanobubble and nanodroplet

Research Project

Project/Area Number	23656155
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Thermal engineering
Research Institution	Kyushu Institute of Technology
Principal Investigator	NAGAYAMA Gyoko 九州工業大学, 工学(系)研究科(研究院), 准教授 (60370029)
Project Period (FY)	2011 – 2013
Keywords	マイクロ・ナノスケール伝熱
Research Abstract	The nanobubbles and nanodroplets exist stable and have been verified through various experiments. However, the experimental results are contradictory to the classical description of Young-Laplace equation. In this study, the liquid-vapor interface structure of the nanobubble and nanodroplet is analyzed and the force balance of the equilibrium nanobubble and nanodroplet are investigated. We find that the intermolecular forces of radial component point to the liquid side to reach the force balance at the curved liquid-vapor interface and the limitation of Young-Laplace equation is clarified. An extended Young-Laplace equation with a novel term of interface tension is proposed for the nanobubble and nanodroplet.

(4 results)