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Numerical simulation of the effect of waves on cavity dynamics for oblique water entry of a cylinder

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Abstract

The water entry process associated with complicated unsteady structures, with consideration of the influence of the waves, is not well studied. In the present work, the oblique water entry of a cylinder under different regular waves is numerically investigated. The volume of fluid (VOF) method and the sub-grid scale (SGS) stress model based on the large eddy simulation (LES) method are adopted for the 3-D simulation with six degrees of freedom. The present numerical model is based on a wave model, and as shown by the previous work that the predicted cavity evolution in the calm water agrees well with the experimental results. The present model is validated and it is shown that it could be used to predict the correct wave periods and fluctuations. The cavity evolution mechanism, the dynamic characteristics and the vortex structures are analyzed. The cavity of the water entry with waves closes more quickly than in the calm water case. Finally, several parametric studies of the water entry with different wave heights and water entry locations are carried out. The results provide insights into the effects of the waves on the cavity dynamics for oblique water entry problems.

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Acknowledgments

This work was suppored by the China Postdoctoral Science Foundation (Grant No. 2019T120211), the Natural Science Foundation of Liaoning Province (Grant No. 2020MS106), the Liaoning Revitalization Talents Program (Grant No. XLYC1908027), the Fundamental Research Funds for the Central Universities (Grant Nos. DUT20TD108, DUT20LAB308) and the Supercomputing Center of Dalian University of Technology.

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Authors and Affiliations

  1. School of Naval Architecture, Liaoning Engineering Laboratory for Deep-Sea Floating Structures, Dalian University of Technology, Dalian, 116024, China

    Gui-yong Zhang, Zhao Hou, Tie-zhi Sun, Bo Zhou & Ying-jie Gao

  2. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, 116024, China

    Gui-yong Zhang, Tie-zhi Sun & Bo Zhou

  3. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai, 200240, China

    Gui-yong Zhang & Bo Zhou

  4. Beijing Institute of Astronautical Systems Engineering, Beijing, 100076, China

    Hai-peng Wei

  5. Marine Design and Research Institute of China, Shanghai, 200011, China

    Ning Li

Authors
  1. Gui-yong Zhang
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  2. Zhao Hou
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  3. Tie-zhi Sun
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  4. Hai-peng Wei
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  5. Ning Li
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  6. Bo Zhou
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Corresponding author

Correspondence to Tie-zhi Sun.

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Project supported by the National Natural Science Foundation of China (Grant Nos. 52061135017, 51709042).

Biography: Gui-yong Zhang (1978-), Male, Ph. D., Professor

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Zhang, Gy., Hou, Z., Sun, Tz. et al. Numerical simulation of the effect of waves on cavity dynamics for oblique water entry of a cylinder. J Hydrodyn 32, 1178–1190 (2020). https://doi.org/10.1007/s42241-020-0083-4

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  • DOI: https://doi.org/10.1007/s42241-020-0083-4

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