Level-set simulations of buoyancy-driven motion of single and multiple bubbles
This paper presents a numerical study of buoyancy-driven motion of single and multiple bubbles by means of the conservative level-set method. First, an extensive study of the hydrodynamics of single bubbles rising in a quiescent liquid is performed, including its shape, terminal velocity, drag coeff...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/81668 |
| Acesso em linha: | https://hdl.handle.net/2117/81668 https://dx.doi.org/10.1016/j.ijheatfluidflow.2015.07.004 |
| Access Level: | acceso abierto |
| Palavra-chave: | Level set methods Bubbles--Dynamics Multiphase flow--Mathematical models Bubble dynamics Level-set method Multiphase flow Bombolles -- Dinàmica Flux multifàsic -- Models matemàtics Corbes de nivell, Mètodes de Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids |
| Resumo: | This paper presents a numerical study of buoyancy-driven motion of single and multiple bubbles by means of the conservative level-set method. First, an extensive study of the hydrodynamics of single bubbles rising in a quiescent liquid is performed, including its shape, terminal velocity, drag coefficients and wake patterns. These results are validated against experimental and numerical data well established in the scientific literature. Then, a further study on the interaction of two spherical and ellipsoidal bubbles is performed for different orientation angles. Finally, the interaction of multiple bubbles is explored in a periodic vertical channel. The results show that the conservative level-set approach can be used for accurate modelling of bubble dynamics. Moreover, it is demonstrated that the present method is numerically stable for a wide range of Morton and Reynolds numbers. |
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