Abstract
Micro-bubble is one of the most promising methods for reduction of skin friction drag. The injection of gas bubbles into a turbulent boundary layer may have multiple impacts on the turbulent flow structure. This work aims to understand the interaction between micro-bubbles and the turbulent boundary layer, especially the effect of the bubble layer thickness on the skin-friction drag reduction. Large eddy simulation was conducted for a turbulent boundary layer over a flat plate, injected with micro-bubbles, with a view to reduce skin-friction drag. The Reynolds number Re θ examined was 1430 based on the momentum thickness θ and free-stream velocity \( U_{\infty } \). A three-dimensional perturbation method was deployed to generate a turbulent boundary layer within a short distance of inflow.
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Acknowledgements
Financial support by Scientific Research Fund of Shenzhen Government through grant JCYJ20160531192108351 is gratefully acknowledged.
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Cao, H.L., Guo, W., Li, X.H., Zhou, Y. (2019). Effect of Micro-bubbles on a Turbulent Boundary Layer. In: Zhou, Y., Kimura, M., Peng, G., Lucey, A., Huang, L. (eds) Fluid-Structure-Sound Interactions and Control. FSSIC 2017. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-10-7542-1_21
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DOI: https://doi.org/10.1007/978-981-10-7542-1_21
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