Investigation of the scattering mechanism of water molecules on solid surface: Toward the analysis of water vapor flow in nanoscale channels

2015 Fiscal Year Final Research Report

• Project/Area Number: 25820040
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Kinefuchi Ikuya 東京大学, 工学(系)研究科(研究院), 講師 (30456165)
• Co-Investigator(Renkei-kenkyūsha): YOSHIMOTO Yuta 東京大学, 大学院工学系研究科, 特任助教 (90772137)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 分子流体力学 / 希薄気体力学 / マイクロ気体流れ / 高クヌッセン数流れ / 分子線散乱実験 / 分子動力学シミュレーション

Outline of Final Research Achievements

Molecular beam experiments were performed to investigate the scattering of water molecules on a solid surface, which is a dominant factor for the transport phenomena of water vapor in micro/nanoscale channels. Even within a narrow energy range corresponding to the thermal motion of gas molecules at room temperature, the scattering behavior on silicon surface varies significantly depending on the incident energy. The mechanism that causes the unusual positive correlation between the incident energy and the tangential momentum accommodation coefficient was clarified using molecular dynamics simulations.

Free Research Field

分子流体力学