単一カビテーションバブルダイナミクスに対する温度効果:水に関する実験的および理論的調査
Hao Geng1, Tairan Chen2, Jiacheng Chen1
1School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Ultrasonics sonochemistry
|August 22, 2025
まとめ
水温はカビテーションバブルのダイナミクスに大きな影響を与える. 高温 (60°C以上) は泡の崩壊を弱め,振動期を短くし,流体動力学を理解するために重要な泡の進化を変化させます.
科学分野:
- 流体力学
- 音響学
- 熱力学について
背景:
- 液体力学における基本的な現象です
- バブルダイナミクスを理解することは様々な産業用途に不可欠です.
- カビテーションバブルの行動に対する水温の影響については,さらなる調査が必要である.
研究 の 目的:
- シングルカビテーションバブルのダイナミクスに対する水温の影響を調査する.
- 気泡の進化,崩壊,気温の変化を分析する.
- 温度が相間質量移転とバブルの内部条件に与える影響を定量化する.
主な方法:
- シングルキャビテーションバブルを生成するために容量放電を使用する実験的アプローチ.
- 温度範囲 (室温から沸点付近) にわたる泡の進化を捉えるための高速撮影.
- 熱伝達,相変化,圧縮性を含む理論的なモデリング.
主要な成果:
- 最大半径と振動期が増加すると,気泡の動態は60°C以上で大きく変化する.
- 最小バブル半径は60°C以下では一定ですが,その後急激に増加し,崩壊が弱くなることを示しています.
- 沸騰に近い温度では,バブルは崩壊する代わりに断片化し,内部圧力/温度が低下します.
結論:
- 高温の水 (60°C以上) は非均衡の間の質量移転を抑制する.
- 温度が上昇すると バブル境界の収縮が遅く 崩壊が弱まります
- 気温はカビテーションバブルの行動とエネルギー分散に影響を与える重要なパラメータです.
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