2023 Fiscal Year Annual Research Report
原子間力顕微鏡による三相界線ナノ構造のダイナミック解析
| Project/Area Number |
21K14097
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| Research Institution | Kyushu University |
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Principal Investigator |
王 振英 九州大学, 工学研究院, 助教 (20896633)
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| Project Period (FY) |
2022-02-01 – 2024-03-31
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| Keywords | three phase contact line / flow pattern / droplet / capillary / Marangoni flow / interfacial mass flux |
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| Outline of Annual Research Achievements |
Continuous investigations are carried out on the flow structure and spreading dynamics of three phase contact line (TPCL) with full consideration of thermophysical properties across phases. Specifically, I formulate an efficient mathematical model for capturing the dominating physics, and apply trajectory analysis and infrared thermography to reveal the transition of internal flow and temperature distribution. A phase diagram is derived to describe the transition of flow state due to the competition of Marangoni flow, capillary flow, and evaporation flux, which in cases leads to the formation of stagnation point near TPCL. The spatiotemporal variations of capillary and Marangoni velocity are further quantified by mathematically decomposing the tangential velocity of interfacial flow.
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