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Two-phase smooth particle hydrodynamics modeling of air-water interface in aerated flows

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Abstract

The large deformations associated with air and water interactions are critical factors that affect the hydrodynamic characteristics of hydraulic structures. As a type of Lagrange meshless particle method, smoothed particle hydrodynamics (SPH) has been shown to have many advantages when modeling the interface flow and tracing the free surface because the particles inherit the velocity, mass, and density properties. Significant theoretical and numerical studies have been performed recently in this area. In the present study, a two-phase SPH framework was developed based on these previous studies and we explored its capacity to capture the main features of large density ratio aerated flows. The cohesive pressure was included only in the momentum equation of the air phase for additional amendments to ensure the stability and accuracy of the two-phase SPH model. Three case studies were performed to test the performance of the two-phase SPH model. A convergence study demonstrated the need to balance the CPU time consumption and the real-time requirements. A dam-break simulation based on pressure variation in the air pocket showed the superior analytical performance of the two-phase model compared with the single-phase model. The results of a hydraulic jump simulation were compared with the theoretical results in order to understand the collision between the solid and liquid using the SPH method more clearly. Thus, the consistency between the simulation and the theoretical and experimental results demonstrated the feasibility and stability of the two-phase SPH framework.

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Authors and Affiliations

  1. College of Civil Engineering, Guizhou University, Guiyang, 550025, China

    HuiXia Yang

  2. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China

    HuiXia Yang, Ran Li, PengZhi Lin, Hang Wan & JingJie Feng

Authors
  1. HuiXia Yang
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  2. Ran Li
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  3. PengZhi Lin
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  4. Hang Wan
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  5. JingJie Feng
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Correspondence to Ran Li or JingJie Feng.

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Yang, H., Li, R., Lin, P. et al. Two-phase smooth particle hydrodynamics modeling of air-water interface in aerated flows. Sci. China Technol. Sci. 60, 479–490 (2017). https://doi.org/10.1007/s11431-016-0586-5

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  • DOI: https://doi.org/10.1007/s11431-016-0586-5

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