Numerical analysis of the dynamics of two similar sized bubbles near a rigid wall
In this work, a numerical investigation of the interaction of two similar sized bubbles near the wall was carried out based on the compressible Volume of Fluid method. The numerical accuracy was confirmed by conducting the independence study of computational domain and mesh resolution, and also vali...
| Autores: | , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/423323 |
| Acceso en línea: | https://hdl.handle.net/2117/423323 https://dx.doi.org/10.1016/j.ces.2024.121115 |
| Access Level: | acceso embargado |
| Palabra clave: | Two similar sized bubbles Bubble morphology Micro-jet Bubble lifespan Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids |
| Sumario: | In this work, a numerical investigation of the interaction of two similar sized bubbles near the wall was carried out based on the compressible Volume of Fluid method. The numerical accuracy was confirmed by conducting the independence study of computational domain and mesh resolution, and also validated by single and two bubbles experiment results. After investigating the main collapsing characteristics (bubble morphology, lifespan, the speed and direction of microjet) of near-wall bubble under single and two-bubble configurations, it is found that the two-bubble configuration significantly changed the bubble morphology and extended their lifespan, and the influence of the upper bubble on the lifespan of the near-wall bubble tends to be consistent under the same bubble–bubble distance when the stand-off distance is larger than two. Moreover, the speed of the microjet in near-wall bubble was increased comparing to single bubble configuration, and this increment decreases with the increase of bubble–bubble distance. In addition, a critical distance ratio was found, below which the direction of micro-jet is away from the wall, and beyond which the micro-jet is directed towards the wall. |
|---|