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Comparative Evaluation of the Immersed-Solid Method for Simulating the Flow Field around Hydrofoil

Author

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  • Zilong Hu

    (College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China)

  • Di Zhu

    (College of Engineering, China Agricultural University, Beijing 100083, China)

  • Ruofu Xiao

    (College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
    Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, China Agricultural University, Beijing 100083, China)

  • Ran Tao

    (College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
    Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, China Agricultural University, Beijing 100083, China)

Abstract

The wall boundary is important in computational-fluid-dynamics simulations. If extremely small leakage, changing leakage or a moving body exists in the simulation case, the difficulty in meshing and solving near-wall flow increases. The immersed-solid method, which inserts a rigid, solid body into the entire fluid domain, was a choice to solve the wall-boundary-solution problems mentioned above, without considering mesh deformation. The purpose of this paper is to verify the effectiveness of the immersed-solid method in the simulation of extremely small leakage, changing leakage or a moving body, and to provide a theoretical basis for the use of the submerged-solid method in engineering. In this study, the NACA0015 hydrofoil was used to check the hydrodynamic characteristics in using the immersed-solid method. The comparative study was conducted at the incidence angle of 8 degrees and a Reynolds number of 5.0 × 10 5 , by using the immersed-solid and traditional no-slip-wall boundary. The results show that the flow striking and separation with pressure rise and drop can be correctly captured using an immersed-solid setup with boundary tracking. However, the accuracy of pressure and velocity field using the immersed-solid method was insufficient. The turbulence-kinetic energy was much higher around the immersed-solid foil body. Generally, the immersed-solid method can qualitatively predict the correct hydrodynamic characteristics. Its convergence ability is better, and it can save approximately 20% of CPU time, even if the grid density is 4.39 times of the traditional no-slip wall. Therefore, the immersed-solid method can be a good choice for engineering-flow cases with complex wall problems.

Suggested Citation

  • Zilong Hu & Di Zhu & Ruofu Xiao & Ran Tao, 2023. "Comparative Evaluation of the Immersed-Solid Method for Simulating the Flow Field around Hydrofoil," Sustainability, MDPI, vol. 15(4), pages 1-14, February.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:4:p:3493-:d:1068357
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    References listed on IDEAS

    as
    1. Changli Hu & Guanghao Chen & Long Yang & Guoyu Wang, 2018. "Large Eddy Simulation of Turbulent Attached Cavitating Flows around Different Twisted Hydrofoils," Energies, MDPI, vol. 11(10), pages 1-15, October.
    2. Weibin Zhang & Qifeng Jiang & Gérard Bois & Hong Li & Xiaobing Liu & Shuai Yuan & Yaguang Heng, 2019. "Experimental and Numerical Analysis on Flow Characteristics in a Double Helix Screw Pump," Energies, MDPI, vol. 12(18), pages 1-17, September.
    3. Zheming Tong & Jiage Xin & Chengzhen Ling, 2021. "Many-Objective Hybrid Optimization Method for Impeller Profile Design of Low Specific Speed Centrifugal Pump in District Energy Systems," Sustainability, MDPI, vol. 13(19), pages 1-19, September.
    4. Kan Kan & Qingying Zhang & Yuan Zheng & Hui Xu & Zhe Xu & Jianwei Zhai & Alexis Muhirwa, 2022. "Investigation into Influence of Wall Roughness on the Hydraulic Characteristics of an Axial Flow Pump as Turbine," Sustainability, MDPI, vol. 14(14), pages 1-20, July.
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