| 研究課題/領域番号 |
21K14097
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| 研究種目 |
若手研究
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| 配分区分 | 基金 |
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| 審査区分 |
小区分19020:熱工学関連
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| 研究機関 | 九州大学 |
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研究代表者 |
王 振英 九州大学, 工学研究院, 助教 (20896633)
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| 研究期間 (年度) |
2022-02-01 – 2024-03-31
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| 研究課題ステータス |
完了 (2023年度)
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| 配分額 *注記 |
4,680千円 (直接経費: 3,600千円、間接経費: 1,080千円)
2022年度: 2,210千円 (直接経費: 1,700千円、間接経費: 510千円)
2021年度: 2,470千円 (直接経費: 1,900千円、間接経費: 570千円)
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| キーワード | three phase contact line / flow pattern / droplet / capillary / Marangoni flow / interfacial mass flux / wetting dynamics / droplet evaporation / capillary force / Three phase contact line / Nanostructure / Atomic Force Microscope / Precursor film / Wetting and spreading |
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| 研究開始時の研究の概要 |
The project aims to realize high-resolution observation of three phase contact line with relative motion taking place at the liquid-solid interface. The spatiotemporal evolution detected by AFM will be numerically fitted with Direct Numerical Simulation (DNS) based on the precursor film theory.
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| 研究実績の概要 |
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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