Coupled liquid-gas flow over a submerged cylinder: interface topology, wake structure and hydrodynamic lift
文献类型：期刊论文
| 作者 | Patel, Kuntal1; Sun J(孙俊)2,3; Yang ZX(杨子轩)2,3; Zhu, Xiaojue1
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| 刊名 | JOURNAL OF FLUID MECHANICS
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| 出版日期 | 2025-03-01 |
| 卷号 | 1008页码:A10 |
| 关键词 | multiphase flow wave-structure interactions vortex shedding |
| ISSN号 | 0022-1120 |
| DOI | 10.1017/jfm.2025.162 |
| 英文摘要 | We perform simulations of a two-fluid-structure interaction problem involving liquid-gas flow past a fully submerged stationary circular cylinder. Interactions between the liquid-gas interface with finite surface tension and flow disturbances arising from the cylinder induce a variety of interfacial phenomena and wake structures. We map different interface regimes in a parameter space defined by the Bond number $Bo \in 100, 5000$ and the submergence depth $h/D \in 1, 2.5$ of the cylinder while keeping the Reynolds (Re) and Weber (We) numbers fixed at 150 and 1000, respectively. The emerging interface features are classified into three distinct regimes: interfacial waves generated by Strouhal vortices, the entrainment of multi-scale gas bubbles and the reduced deformation state. In the interfacial wave regime, we demonstrate that the frequency of transverse interface fluctuations at a specific streamwise location is identical to the vortex shedding frequency. Additionally, the wavelength of interfacial waves is determined by the size of vortex pairs consisting of alternating Strouhal vortices. In the gas entrainment regime at $ Bo = 1000$ , our bubble-size distributions reveal that the entrained bubbles have sizes ranging from one to two orders of magnitude smaller than the cylinder. These multi-scale bubbles are formed primarily through plunging and surfing breakers at $h/D = 2.5$ . In contrast, at $h/D = 1$ , smaller bubbles initially emerge from the breakup of a gas finger. Over time, some of these bubbles grow in size through coalescence cascades. The influence of $ Re \in 50, 150$ and $ We \in 700, 1100$ on gas entrainment is quantified in terms of mean bubble size and count. Lastly, we demonstrate how the deformability of the liquid-gas interface drives the hydrodynamic lift force acting on the cylinder. The net downward lift materializes only in the gas entrainment and reduced deformation regimes due to the broken symmetry of the front stagnation point. While our study focuses on two-dimensional simulations, we also provide insights into the three-dimensional gas entrainment mechanism for one of the extreme cases at $h/D = 1$ . |
| 分类号 | 一类/力学重要期刊 |
| WOS研究方向 | Mechanics ; Physics, Fluids & Plasmas ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001454619400001 |
| 资助机构 | The authors acknowledge financial support from the Max Planck Society and the German Research Foundation (DFG) through projects 521319293, 540422505 and 550262949. The authors also gratefully acknowledge the computing time provided on the high performance computer Lichtenberg at the NHR Center NHR4CES-TU Darmstadt, funded by Germany's Federal Ministry of Education and Research and participating state governments, based on GWK resolutions for national high-performance computing at universities. The authors appreciate access to the HPC systems of the Max Planck Computing and Data Facility(MPCDF), the GCS Supercomputer Super MUC-NG at the Leibniz Supercomputing Centre (LRZ) and the HoreKa supercomputer funded by the Ministry of Science, Research and the Arts Baden-Wurttemberg along with the Federal Ministry of Education and Research |
| 其他责任者 | Zhu, Xiaojue |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/101440]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Max Planck Society; 2.Institute of Mechanics, CAS; 3.University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | Patel, Kuntal,Sun J,Yang ZX,et al. Coupled liquid-gas flow over a submerged cylinder: interface topology, wake structure and hydrodynamic lift[J]. JOURNAL OF FLUID MECHANICS,2025,1008:A10. |
| APA | Patel, Kuntal,孙俊,杨子轩,&Zhu, Xiaojue.(2025).Coupled liquid-gas flow over a submerged cylinder: interface topology, wake structure and hydrodynamic lift.JOURNAL OF FLUID MECHANICS,1008,A10. |
| MLA | Patel, Kuntal,et al."Coupled liquid-gas flow over a submerged cylinder: interface topology, wake structure and hydrodynamic lift".JOURNAL OF FLUID MECHANICS 1008(2025):A10. |
入库方式： OAI收割
来源：力学研究所
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