Analysis and control of bubble generation in nanopores

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02081
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 19020:Thermal engineering-related
• Research Institution: The University of Tokyo
• Principal Investigator: Daiguji Hirofumi 東京大学, 大学院工学系研究科(工学部), 教授 (10302754)
• Co-Investigator(Kenkyū-buntansha): 徐 偉倫 東京大学, 大学院工学系研究科(工学部), 准教授 (50771549)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 沸騰 / 気泡 / 核生成 / 相変化 / ナノ流体力学

Outline of Final Research Achievements

To fully exploit the advantages of phase change heat transfer in high heat flux applications such as electronic chip cooling and spray cooling, it is necessary to understand vapor bubble dynamics and boiling phenomena on nanometer length scales and nanosecond time scales. In this study, we constructed an experimental system for boiling using a solid nanopore and used electrochemical measurements, acoustic measurements, and numerical simulations to capture nanoscale boiling phenomena from the dynamics of a single vapor bubble.

Free Research Field

熱工学

Academic Significance and Societal Importance of the Research Achievements

本研究では，加熱を集中させて気泡核を一つだけ作ることと，核生成後のナノ気泡のダイナミクスをナノ秒スケールで実験的に捉えることの二つの課題を克服し，ナノ細孔内の単一蒸気ナノ気泡のダイナミクスを実験的捉えることに成功した．また，同じ系を数値シミュレーションで再現した．単一蒸気気泡のダイナミクスと系全体の加熱量を同時に捉えることは，沸騰現象の理解を深めるだけでなく，新しい冷却技術の開発にも繋がる．