Study on the physics during the final stageof bubble collapse

气泡破裂最后阶段的物理研究

• 批准号: 21360086
• 负责人: TAKAHIRA Hiroyuki
• 金额: $ 12.4万
• 依托单位: Osaka Prefecture University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21360086/
• 关键词: 流体工学; 気泡; 気液二相流; 衝撃波; 液体ジェット; Ghost Fluid法; 非平衡相変化; 熱移動; ベンチュリ管; 相変化

An improved ghost fluid method has been developed for understanding nonspherical bubble collapse with nonequilibrium phase transition.We have succeeded in capturing the fine interfacial structure by using adaptive zonal grids in which the grid resolution is changed according to the volume change and translational motion of a bubble. The pressure and temperature discontinuity at the bubble interface has been captured sharply with ghost fluids. The method has been applied to the bubble collapse by shock-bubble interactions and to the collapse of a bubble cloud in a channel, and so on. The bubble collapse and the propagation of pressure waves in gas-liquid two-phase Venturi flows have also been investigated, experimentally. The influence of nonequilibrium phase transition on bubble collapse and the characteristic of pressure waves with bubble oscillations in bubble mixtures have been clarified.

本文提出了一种改进的鬼流体方法，用于研究非平衡相变非球形汽泡的溃灭，采用自适应分区网格，根据汽泡的体积变化和平移运动改变网格分辨率，成功地捕捉到了精细的界面结构。在气泡界面处的压力和温度的不连续性已被捕获与鬼流体急剧。该方法已应用于激波-气泡相互作用引起的气泡溃灭和通道中气泡云的溃灭等问题，并对气液两相文丘里流中气泡溃灭和压力波的传播进行了实验研究。阐明了非平衡相变对汽泡溃灭的影响以及汽泡振荡压力波的特性。

项目成果

Numerical Investigations of Thermal Effects on the Interaction of Shock Waves with Bubbles

冲击波与气泡相互作用热效应的数值研究

• 发表时间: 2011
• 期刊: Proceedings of ASME-JSME- KSME Joint Fluids Engineering Conference 2011 (AJK2011)
• 作者: X. Wang;T. Nakata;N. Nishihashi H. Liu;Y. Jinbo and H. Takahira
• 通讯作者: Y. Jinbo and H. Takahira

Direct Numerical Simulations of Bubble Collapse near a Tissue Surface with the Ghost Fluid Method

用幻影流体法直接数值模拟组织表面附近的气泡破裂

• 发表时间: 2009
• 作者: Y. Maeda;D. Yamamoto and Y. Hagiwara;Katsunori Hanamura;H. Takahira
• 通讯作者: H. Takahira

Numerical Investigations of Nonspherical Bubble Collapse near Boundaries by the Improved Ghost Fluid Method

改进幽灵流体法对边界附近非球形气泡破裂的数值研究

• DOI: 10.3850/978-981-07-2826-7_202
• 发表时间: 2012
• 期刊: Proceedings of the 8th International Symposium on Cavitation
• 作者: H.Liu;H.Aono;Jinbo Yoshinori
• 通讯作者: Jinbo Yoshinori

マルチグリッドGhost Fluid法による生体組織近傍の気泡崩壊現象に関する数値計算(2つのLevel Set関数による界面捕獲法の適用)

使用多网格Ghost Fluid方法对生物组织附近的气泡破裂现象进行数值计算（使用两个Level Set函数的界面捕获方法的应用）

• 发表时间: 2009
• 作者: 崔題恩;武居昌宏;小林一道
• 通讯作者: 小林一道

Numerical Investigation of Viscous Effect on the Bubble Collapse in a Compressible Liquid with the Ghost Fluid Method

用幽灵流体法数值研究可压缩液体中粘性效应对气泡破裂的影响

• 发表时间: 2012
• 期刊: Proceedings of the Eighth KSME-JSME Thermal and Fluids Engineering Conference
• 作者: 中嶋大樹;畑中祥吾;三浦英昭;後藤俊幸;T.Ogasawara
• 通讯作者: T.Ogasawara