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Level-set simulations of buoyancy-driven motion of single and multiple bubbles
Balcázar Arciniega, Néstor; Lehmkuhl Barba, Oriol; Jofre Cruanyes, Lluís; Olivaa, Assensi
Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor
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.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
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
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info:eu-repo/semantics/submittedVersion
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