75th Annual Meeting of the APS Division of Fluid Dynamics (November 20, 2022 — November 22, 2022)

V0098: Free Rising Bubble in Quiescent Water

  • Jose Moreto, San Diego State University
  • Yuichiro Tobita, San Diego State University
  • Nfn Bhavana, San Diego State University
  • Evan Green, San Diego State University
  • Xiaofeng Liu, San Diego State University
DOI: https://doi.org/10.1103/APS.DFD.2022.GFM.V0098

Bubble rising in water represents rich physics. Here we show the kinematic behavior of air bubbles rising in quiescent water captured by a high-speed camera at image acquisition speed of 6,000 and 20,000 frames per second, respectively. Clearly it can be seen from the video that the rising bubbles are subject to a dynamic process featuring the constant changing of their rising speed, the time-varying deformation of their geometric shapes, the sinusoidal helical motion, etc., depending on their initial release speed and volume flow rate. Observation of the kinematic motion of the bubbles provides a means for us to further understand the time-dependent interactions between various forces such as buoyancy, pressure, viscous shear, surface tension and gravity that are involved in the dynamic bubble rising process. 

Funding support from ONR (Grant number N00014-21-1-2392), DoD (Award number W911NF2110158) and SDSU CORE Fellowship 2022-2023 are gratefully acknowledged. For more information regarding our research projects, please visit our lab website at http://liu.sdsu.edu/, or contact the PI at Xiaofeng.Liu@sdsu.edu.

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