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A CAD-compatible body-fitted particle generator for arbitrarily complex geometry and its application to wave-structure interaction

  • Special Column on the 4th CMHL Symposium 2021 (Guest Editor Decheng Wan)
  • Published:
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Abstract

Generating body-fitted particle distribution for arbitrarily complex geometry underpins the applications of particle-based method to engineering and bioengineering and is highly challenging, and thus hinders the potential of particle methods. In this paper, we present a new computer-aided design (CAD) compatible body-fitted particle generator, termed as CAD-BPG, for arbitrarily complex 3-D geometry. By parsing a CAD model, the present method can accurately tackle arbitrarily complex geometry representation and describe the corresponding geometry surface by constructing an implicit zero level-set function on Cartesian background mesh. To achieve a body-fitted and isotropic particle distribution, physics-driven relaxation process with surface bounding governed by the transport-velocity formulation of smoothed particle hydrodynamics (SPH) methodology is conducted to characterize the particle evolution. A set of examples, ranging from propeller, stent structures and anatomical heart models, show simplicity, accuracy and versatility of the present CAD-BPG for generating body-fitted particle distribution of arbitrarily complex 3-D geometry. Last but not least, the present CAD-BPG is applied for modeling wave-structure interaction, where wave interaction with an oscillating wave surge converter is studied, and the results show that the present method not only provides an efficient and easy-to-implement pre-processing tool for particle-based simulation but also improves the numerical accuracy compared with lattice particle distribution. Consequently, the propose CAD-BPG sheds light on simulating real-world applications by particle-based methods for researchers and engineers.

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Acknowledgment

The work was supported by the National Natural Science Foundation of China (Grant No. 91952110), the Deutsche Forschungsgemeinschaft under (Grant Nos. DFG HU1572/10-1, DFG HU1527/12-1).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Technical University of Munich, Garching, Germany

    Yujie Zhu, Chi Zhang & Xiangyu Hu

  2. Department of Aerospace and Geodesy, Technical University of Munich, Taufkirchen, Germany

    Yongchuan Yu

Authors
  1. Yujie Zhu
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  2. Chi Zhang
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  3. Yongchuan Yu
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  4. Xiangyu Hu
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Corresponding authors

Correspondence to Chi Zhang or Xiangyu Hu.

Additional information

Biography: Yujie Zhu (1992-), Male, Ph. D. Candidate

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Zhu, Y., Zhang, C., Yu, Y. et al. A CAD-compatible body-fitted particle generator for arbitrarily complex geometry and its application to wave-structure interaction. J Hydrodyn 33, 195–206 (2021). https://doi.org/10.1007/s42241-021-0031-y

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  • DOI: https://doi.org/10.1007/s42241-021-0031-y

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