非線形弾性を持つ粘性弾性介質における超音波カビテーションダイナミクスとサブハーモニック放出に対するバブル間相互作用の影響
Dui Qin1, Qianru Yang2, Bingyu Zhang2
1Department of Biomedical Engineering, School of Life Health Information Science and Engineering, Chongqing University of Posts and Telecommunications, Chongqing, China; Postdoctoral Workstation of Chongqing General Hospital, Chongqing, China.
Ultrasonics sonochemistry
|September 2, 2025
まとめ
粘性弾性材料の超音波カビテーションバブル間の相互作用は,バブルダイナミクスとサブハーモニー放射を大幅に変化させます. より大きな泡は,より小さな泡に影響を与え,特に超音波の振幅が増加したり,泡の近さが減少したりすると,サブハーモニックの生成と強度に影響を与えます.
科学分野:
- 音響学
- 流体力学
- 材料科学
背景:
- 粘弾性介質における超音波カビテーションは,化学,食品,および生物医学的な用途に不可欠です.
- カビテーション効果は,バブル間の相互作用によって影響を受け,振動するバブルから生じる.
- これらの相互作用が粘性弾性材料におけるカビテーションの動力学と音響放出に与える影響は十分に理解されていません.
研究 の 目的:
- 非線形弾性を持つ粘性弾性介質における相互作用するカビテーションバブルのダイナミクスをモデル化し,数値的に調査する.
- バブル間の相互作用がバブル動力学とサブハーモニーカビテーション放射にどのように影響するかを定量的に調べる.
主な方法:
- 泡の相互作用と粘弾性媒体の非線形弾性性を数値モデルに組み込みました.
- ダイナミックな行動とサブハーモニアの放出を分析する2つのバブルシステムを調査した.
主要な成果:
- 相互作用は振動幅 (強化または抑制) にさまざまな影響を及ぼし,異なるサイズのバブルに影響を与えます.
- より大きなバブルは,より小さなバブルに,より大きな影響を及ぼし,サブハーモニー放射の発生に影響を与えます.
- 相互作用によって引き起こされるシフトと共鳴ピークの鈍化により,サブハーモニー放射が新たに生成または排除されることがあります.
結論:
- 超音波の振幅の増加とバブル距離の減少は,サブハーモニー共鳴に対する相互作用効果を強める.
- 強化された相互作用は共鳴行動を変えて サブハーモニアの放出を増幅します
- 発見は,超音波カビテーションのダイナミクスと粘着弾性介質のサブハーモニー放出に関する新しい洞察を提供します.
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