関連する実験動画
Updated: Jul 12, 2026

08:34
Cryogenic Liquid Jets for High Repetition Rate Discovery Science
Published on: May 9, 2020
まとめ
研究者らは水質を調査した.
科学分野:
- 熱力学は熱力学である.
- 物理化学 物理化学について
- 流体力学 流体力学とは
背景:
- 極端な条件下での液体の振る舞いを理解することは極めて重要です.
- 均質な核化の限界は,液体が自発的に泡を形成する点を定義します.
- 張力下での水のユニークな性質は,完全に理解されていません.
研究 の 目的:
- 水の伸縮のための均質な核化限界を決定する.
- 様々な密度や負圧で水の空洞化行動を調査する.
- 緊張状態の水に対する既存の核化理論の妥当性を検証する.
主な方法:
- 液体内の高張力を達成するために,アイソコリック冷却法.
- 密度の範囲にわたる水の制御された伸縮.
- カビテーションの張力の測定と理論的な予測との比較.
主要な成果:
- 低密度 (0.550.68 g/ml) の過熱水に関するスクリポフのデータと一致する.
- カビテーションは,0.68〜0.93g/mlの密度で負圧 (テンション) の下でのみ観察されました.
- 測定された緊張はフィッシャーの1948年の蒸気核化理論の予測と一致した.
- 最大張力140MPaは42°Cで到達し,Speedyの水に対する回転型スピノダルの仮説を裏付けました.
結論:
- 水は,0.68g/ml以上の密度で,張力下で穴を開く.
- 実験データでは,水中に再侵入するスピノダルの存在を強く支持しています.
- この研究は,同質核化限界における水の行動に関する重要な洞察を提供します.
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