Investigation of physical model for wettability on solid-liquid-gas interface

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04248
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 19020:Thermal engineering-related
• Research Institution: Kansai University
• Principal Investigator: Ami Takeyuki 関西大学, システム理工学部, 准教授 (00581654)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 数値シミュレーション / 伝熱工学 / 沸騰 / 濡れ性

Outline of Final Research Achievements

The aim of this study is to construction of physical model for wettability on solid-liquid-gas interfaces and numerically realize the boiling phenomena taken account of wettability. The numerical simulation of boiling phenomena was implemented with VOF method. In this calculation, in order to calculate boiling and condensation phenomena, the phase change model was added to the energy conservation equation. Moreover, k-omega SST model in low Reynolds turbulent model was selected as the heat transfer term due to turbulent flow. The mass transfer coefficient for evaporation and condensation were set at different value each other. We successfully numerically have realized the bubble behavior in subcooled nucleate boiling.

Free Research Field

熱工学

Academic Significance and Societal Importance of the Research Achievements

濡れ性は固気液三相界面で生じる現象であり、その物理モデルの構築は様々な分野で応用が期待される。本研究では、濡れ性を考慮した強制流動沸騰現象の数値シミュレーションを実施した。相変化を伴う熱交換器、ボイラ、エアコン・冷凍機器におけるエバポレータ、コンデンサ、高性能電子機器冷却などにおいて高い冷却性能を持つ相変化熱伝達の解析、冷却・伝熱性能の評価を行う上で重要となるものである。様々な流動系に適用することが可能であり、上昇流のみならず水平流、下降流、傾斜流など実際の機器の設計に応じた解析が可能である。