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Vortex identification methods in marine hydrodynamics

  • Special Column on the 3rd Symposium on Computational Marine Hydrodynamics (Guest Editor De-Cheng Wan)
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Abstract

In this paper, several commonly used vortex identification methods for marine hydrodynamics are revisited. In order to extract and analyse the vortical structures in marine hydrodynamics, the Q, λ2 — criterion and modified normalized Liutex/Rortex \(\it {\tilde\Omega_R}\) method are utilized for vortex identification for propeller open water test, ship drag test, ship propeller-rudder interaction, VIV of a marine riser and VIM of a Spar platform. The limitation of Q and λ2 — criterion is discussed. The Liutex/Rortex \(\it {\tilde\Omega_R}\) method is promising for convenient and accurate vortex identification and visualization. However, care should be taken when choosing the small parameter b0 for \(\it {\tilde\Omega_R}\). We proposed recommended values of b0 for marine hydrodynamic problems.

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Acknowledgements

This work was supported by the Chang Jiang Scholars Program (Grant No. T2014099), the Shanghai Excellent Academic Leaders Program (Grant No. 17XD1402300) and the Innovative Special Project of Numerical Tank of Ministry of Industry and Information Technology of China (2016-23/09).

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Authors and Affiliations

  1. Computational Marine Hydrodynamics Lab (CMHL), School of Naval Architecture, Ocean and Civil Engineering, State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Wei-wen Zhao, Jian-hua Wang & De-cheng Wan

Authors
  1. Wei-wen Zhao
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  2. Jian-hua Wang
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  3. De-cheng Wan
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Corresponding author

Correspondence to De-cheng Wan.

Additional information

Project supported by the National Natural Science Foundation of China (Grant Nos. 51909160, 51879159), the National Key Research and Development Program of China (Grant Nos. 2019YFB1704200, 2019YFC0312400).

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Zhao, Ww., Wang, Jh. & Wan, Dc. Vortex identification methods in marine hydrodynamics. J Hydrodyn 32, 286–295 (2020). https://doi.org/10.1007/s42241-020-0022-4

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  • DOI: https://doi.org/10.1007/s42241-020-0022-4

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