Abstract
The rising behavior of bubbles undergoing bubble-bubble interaction in a viscous liquid is studied using a two-dimensional direct numerical simulation. Level contour reconstruction method (LCRM), one of the connectivity-free front tracking methods, is applied to describe a moving interface accurately under highly deformable conditions. This work focuses on the effects of bubble size on the interaction of two bubbles rising side-by-side in a stagnant liquid. Several characteristics of bubble-bubble interaction are analyzed quantitatively as supported by energy analysis. The results showed clear differences between small and large bubbles with respect to their interaction behavior in terms of lateral movement, vortex intensity, suppression of surface deformation, and viscous dissipation rate. Distributions of vorticity and viscous dissipation rate near the bubble interfaces also differed depending on the size of the bubbles. Strong vortices from large bubbles triggered oscillation in bubble-bubble interaction and played a dominant role in the interaction process as the size of bubbles increases.
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Recommended by Associate Editor Shin Hyung Rhee
Ikroh Yoon received his B.S. and M.S. degrees from Hongik University in 2009 and 2011, respectively. He is currently a senior researcher working at the Korea Institute of Marine Science and Technology Promotion. His research interests include computational fluid dynamics for multiphase flows.
Seungwon Shin received his B.S. and M.S. degrees in Mechanical Engineering from Seoul National University, Korea in 1995 and 1998, respectively. He received his Ph.D. from Georgia Tech. in 2002. Dr. Shin is currently a professor at the School of Mechanical and System Design Engineering at Hongik University in Seoul, Korea. Dr. Shin’s research interests include computational fluid dynamics, multiphase flow, surface tension effect and phase change process.
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Yoon, I., Shin, S. Numerical investigation of interaction between rising bubbles in a viscous liquid. J Mech Sci Technol 30, 3165–3172 (2016). https://doi.org/10.1007/s12206-016-0627-2
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DOI: https://doi.org/10.1007/s12206-016-0627-2