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Animating turbulent water by vortex shedding in PIC/FLIP

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Abstract

In this paper, we present a hybrid method, which integrates PIC/FLIP and vortex particle methods into a unified framework, to efficiently simulate vortex shedding that happens when fluids flow around internal obstacles. To improve efficiency and reduce the numerical dissipations, we first solve the governing equations on a coarse grid using PIC/FLIP, and then interpolate the intermediate results to a finer grid to obtain the base flow. When the regular particles in PIC/FLIP enter the boundary layer, if the specified conditions are satisfied to cause vortex shedding, they are selected as vortex particles by assigning additional vorticity related attributes. The vortex particle dynamics are controlled by the vorticity form of NS equations, and several efficient methods are proposed to solve them on the finer grid. Finally, the obtained turbulence flow is added to the base flow. As a result, we are able to simulate turbulent water with rich wake details around the internal obstacles.

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Authors and Affiliations

  1. Computer Graphics and Multimedia Laboratory(NG04), Faculty of Science and Technology, University of Macau, Macao SAR, China

    Jian Zhu, YuanZhang Chang & EnHua Wu

  2. State Key Laboratory of Computer Science, Institute of Software, Chinese Academy of Sciences, Beijing, 100190, China

    EnHua Wu

  3. School of Information Engineering, Chang’an University, Xi’an, 710064, China

    YouQuan Liu

Authors
  1. Jian Zhu
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  2. YouQuan Liu
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  3. YuanZhang Chang
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  4. EnHua Wu
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Correspondence to Jian Zhu.

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Zhu, J., Liu, Y., Chang, Y. et al. Animating turbulent water by vortex shedding in PIC/FLIP. Sci. China Inf. Sci. 56, 1–11 (2013). https://doi.org/10.1007/s11432-013-4806-9

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  • DOI: https://doi.org/10.1007/s11432-013-4806-9

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