毛細な媒体の表面蒸発と進化:柱配列マイクロモデルの研究
1Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; State Key Laboratory of Geomechanics and Geotechnical Engineering Safety, Wuhan, Hubei 430071, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Journal of colloid and interface science
|August 24, 2025
まとめ
狭い毛穴での蒸発は 毛穴の大きさだけでなく インターフェースの形によって制御されます 毛穴スケールの液体蒸気界面を理解することで,土壌水文学と海水淡化モデルが改善されます.
科学分野:
- 毛細な媒体の物理
- 多相流量
- インターフェース現象
背景:
- 狭い毛穴での蒸発は,土壌の塩化と塩分除去に不可欠です.
- 従来のモデルでは,空気侵入後の液体-蒸気インターフェースの ダイナミックな進化を無視しています
- 孔の閉じ込めとインターフェースの形状は,局所的な蒸発率に大きな影響を与えます.
研究 の 目的:
- 蒸発速度に対する毛穴の閉じ込めとインターフェース形態の影響を調査する.
- 毛細な媒体の相変化を予測するためのメカニズム的枠組みを開発する.
主な方法:
- 2Dの多孔メディアアナログとして柱配列マイクロモデルを使用した.
- リアルタイムの可視化と高解像度画像処理を使用しています.
- 界面領域と曲線の定量化された時空的変動.
主要な成果:
- 外部インタフェースは相変化の85~92%を占め,内部インタフェースは15%未満であった.
- 蒸発運動は,交差点の曲率半径が減少するにつれて指数関数的に増加した.
- 特徴的な界面曲率長さスケール (1~50μm) が蒸発速度を決定した.
結論:
- 孔の閉じ込めと界面の幾何学は蒸発運動を高めます
- 発見は,より小さな毛穴での蒸発の表面的な抑制を明らかにします.
- インターフェイス幾何学を,多孔性媒体の相変化予測に結びつけるメカニズム的枠組みを確立した.
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