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Level-set simulations of buoyancy-driven motion of single and multiple bubbles,

Lookup NU author(s): Dr Néstor Balcázar ArciniegaORCiD

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Abstract

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.

Publication metadata

Author(s): Balcázar N, Lehmkuhl O, Jofre L, Oliva A

Publication type: Article

Publication status: Published

Journal: International Journal of Heat and Fluid Flow

Year: 2015

Volume: 56

Pages: 91-107

Print publication date: 01/12/2015

Online publication date: 25/07/2015

Acceptance date: 07/07/2015

ISSN (print): 0142-727X

ISSN (electronic): 1879-2278

Publisher: Elsevier Inc.

URL: https://doi.org/10.1016/j.ijheatfluidflow.2015.07.004

DOI: 10.1016/j.ijheatfluidflow.2015.07.004

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