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Energy convergence effect and jet phenomenon of shock-heavy spherical bubble interaction

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  • Fluid Dynamics
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Abstract

We present computational results on the evolution of the shock-accelerated heavy bubbles surrounded by nitrogen with the Atwood number A t = 0.497–0.677 and the emphasis is on the jet phenomenon caused by the shock focusing. The multi-fluid Eulerian equation is solved by a finite volume method based on MUSCL-Hancock approach. Based on the numerical schlieren and the distributions of density and pressure, it is found that there are three typical jet structures (outward jet, no jet, inward jet) for different combinations of gas mixture inside the bubble which determine the position of shock focusing relative to the downstream pole of the heavy bubble (upstream of the pole, at the pole, downstream the pole). Compared with the inward jet, the velocity of outward jet is obviously larger. As A t increases, the moment of jet formation is postponed, and the maximal values and magnifications of pressure and density increase distinctly. Therefore, the energy convergence effects are heavily enhanced with the increase of bubble gas density.

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Authors and Affiliations

  1. Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, 621900, China

    LiYong Zou, JinHong Liu, YanPing Wang & CangLi Liu

  2. Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences University of Cambridge, Cambridge, CB3 0WA, UK

    LiYong Zou

  3. Advanced Propulsion Laboratory, Department of Modern Mechanics, University of Science and Technology of China, Hefei, 230026, China

    ZhiGang Zhai

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  1. LiYong Zou
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  2. ZhiGang Zhai
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  5. CangLi Liu
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Correspondence to LiYong Zou.

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Zou, L., Zhai, Z., Liu, J. et al. Energy convergence effect and jet phenomenon of shock-heavy spherical bubble interaction. Sci. China Phys. Mech. Astron. 58, 124703 (2015). https://doi.org/10.1007/s11433-015-5697-0

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  • DOI: https://doi.org/10.1007/s11433-015-5697-0

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