{"title":"垂直壁面附近单泡上升动力学研究","authors":"Zhen Jiang , Jiaojiao Guo , Zhen Jian","doi":"10.1016/j.ijmultiphaseflow.2025.105335","DOIUrl":null,"url":null,"abstract":"<div><div>Bubble dynamics are fundamental in various scientific and engineering fields, from chemical engineering to environmental science. Here, single bubble rising near a vertical wall in a viscous liquid in a Hele-Shaw cell was investigated through direct numerical simulations in a two-dimensional framework, and the effects of the bubble size and of the initial distance between the wall and the bubble on the rising dynamics were studied. Different rising mechanisms such as rectilinear rising and zigzagging were identified. It is revealed that small bubble (<span><math><mrow><mi>D</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>5</mn><mo>,</mo><mn>1</mn></mrow></math></span> mm) prefers rectilinear rising, while larger bubble (<span><math><mrow><mi>D</mi><mo>=</mo><mn>2</mn><mo>,</mo><mn>3</mn><mo>,</mo><mn>4</mn><mo>,</mo><mn>5</mn></mrow></math></span> mm) prefers zigzagging. The bubble will migrate away from the vertical wall, either turn back to vertical rising or trigger an earlier zigzagging as it migrates further away. Characteristics of the bubble, such as horizontal and vertical velocities, drag coefficient and aspect ratio were analyzed and the vortex dynamics were studied. The lost of symmetry of the vortices in the wake of the bubble could be responsible for the starting of zigzagging.</div></div>","PeriodicalId":339,"journal":{"name":"International Journal of Multiphase Flow","volume":"192 ","pages":"Article 105335"},"PeriodicalIF":3.8000,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"On the dynamics of single bubble rising near a vertical wall\",\"authors\":\"Zhen Jiang , Jiaojiao Guo , Zhen Jian\",\"doi\":\"10.1016/j.ijmultiphaseflow.2025.105335\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Bubble dynamics are fundamental in various scientific and engineering fields, from chemical engineering to environmental science. Here, single bubble rising near a vertical wall in a viscous liquid in a Hele-Shaw cell was investigated through direct numerical simulations in a two-dimensional framework, and the effects of the bubble size and of the initial distance between the wall and the bubble on the rising dynamics were studied. Different rising mechanisms such as rectilinear rising and zigzagging were identified. It is revealed that small bubble (<span><math><mrow><mi>D</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>5</mn><mo>,</mo><mn>1</mn></mrow></math></span> mm) prefers rectilinear rising, while larger bubble (<span><math><mrow><mi>D</mi><mo>=</mo><mn>2</mn><mo>,</mo><mn>3</mn><mo>,</mo><mn>4</mn><mo>,</mo><mn>5</mn></mrow></math></span> mm) prefers zigzagging. The bubble will migrate away from the vertical wall, either turn back to vertical rising or trigger an earlier zigzagging as it migrates further away. Characteristics of the bubble, such as horizontal and vertical velocities, drag coefficient and aspect ratio were analyzed and the vortex dynamics were studied. The lost of symmetry of the vortices in the wake of the bubble could be responsible for the starting of zigzagging.</div></div>\",\"PeriodicalId\":339,\"journal\":{\"name\":\"International Journal of Multiphase Flow\",\"volume\":\"192 \",\"pages\":\"Article 105335\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2025-07-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Multiphase Flow\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0301932225002137\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MECHANICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Multiphase Flow","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0301932225002137","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}
On the dynamics of single bubble rising near a vertical wall
Bubble dynamics are fundamental in various scientific and engineering fields, from chemical engineering to environmental science. Here, single bubble rising near a vertical wall in a viscous liquid in a Hele-Shaw cell was investigated through direct numerical simulations in a two-dimensional framework, and the effects of the bubble size and of the initial distance between the wall and the bubble on the rising dynamics were studied. Different rising mechanisms such as rectilinear rising and zigzagging were identified. It is revealed that small bubble ( mm) prefers rectilinear rising, while larger bubble ( mm) prefers zigzagging. The bubble will migrate away from the vertical wall, either turn back to vertical rising or trigger an earlier zigzagging as it migrates further away. Characteristics of the bubble, such as horizontal and vertical velocities, drag coefficient and aspect ratio were analyzed and the vortex dynamics were studied. The lost of symmetry of the vortices in the wake of the bubble could be responsible for the starting of zigzagging.
期刊介绍:
The International Journal of Multiphase Flow publishes analytical, numerical and experimental articles of lasting interest. The scope of the journal includes all aspects of mass, momentum and energy exchange phenomena among different phases such as occur in disperse flows, gas–liquid and liquid–liquid flows, flows in porous media, boiling, granular flows and others.
The journal publishes full papers, brief communications and conference announcements.