Christian Kähler

Analysis of mixing and mass transport processes in bubble swarms under the influence of bubble-induced turbulence


Institute of Fluid Mechanics and Aerodynamics, Universität der Bundeswehr München

Project leader:

Prof. Dr. Christian Kähler


Katharina Haase, M.Sc.

Project description:

Aim of this project is to investigate the mixing and mass transport processes in bubble swarms taking into account the effect of bubble-induced flow turbulence. High resolution 3D optical measurement techniques will be applied to determine the underlying physical processes, in order to verify existing mass transport models and to validate numerical simulations carried out by the project partners. The experiments will be conducted in a custom built channel. Fractal and active turbulence grids will be used to adapt the turbulence level over a wide range of scales and intensities in order to simulate the intensity, spectral characteristics and coherence of real bubble-induced turbulence. This unique approach is applied to study the behavior of a single bubble or groups of bubbles in a realistic turbulent flow. In particular, bubble motion, bubble deformation, bubble vibration, mass transport into the turbulent flow, and mixing processes caused by the bubble-induced turbulence will be systematically investigated using state-of-the-art, non-intrusive 3D optical measurement techniques and compared with numeric.

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