Three-Dimensional Numerical Simulations of the Effect of Initial Bubble Conditions on the Motion of a Bubble Rising in Viscous Liquids

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The effect of initial bubble conditions on the motion of a gas bubble rising in viscous liquids was investigated by 3D-computations. Then, a coupled level set/volume-of-fluid (CLSVOF) method was used as a numerical method. For high Eötvös and very low Morton numbers regions predicting a 3D “spherical-cap” bubble, it was computationally demonstrated that the resulting final state of bubbles depended on initial bubble conditions; bubbles with break-up at the center or “spherical-cap” bubbles depending on initial bubble conditions were reproduced. On the other hand, we showed for low Eo and high M conditions that initial bubble conditions did not affect the terminal state of bubble rising motion.

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