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Hydraulic conveying of particles within pipelines is widely applied in the energy and chemical industries. During the conveying process, the occurrence of high localized particle concentrations and reduced particle velocities within the pipeline frequently leads to particle deposition or even complete blockage within the conveyance system. This study adopts the Multiphase Particle-In-Cell (MP-PIC) method to systematically investigate the characteristics of particle hydraulic transport in small inclination pipelines, focusing on particle spatial distribution, transport efficiency, and drag force models. The results indicate that the Wenyu drag model can effectively capture particle accumulation in gas-liquid environments, and pipeline transport efficiency increases with the decrease of the solid-liquid ratio. Considering the impact of particle concentration and pipeline inclination on flow velocity, a transport critical velocity model is developed and verified to have an error within 10%. Furthermore, Liutex identification method is utilized for capturing the vortex motion between the fluids and particles in three-phase flow.

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Numerical Study on Multiphase Flow of Petroleum Coke Particles Transported in Pipelines Based on Liutex Identification

  • 会议论文

  • 发表日期：

    2025年

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  • Wen Su,
  • Xiangrui Dong,
  • Wu Zhou,
  • Xiaoshu Cai

摘要

Hydraulic conveying of particles within pipelines is widely applied in the energy and chemical industries. During the conveying process, the occurrence of high localized particle concentrations and reduced particle velocities within the pipeline frequently leads to particle deposition or even complete blockage within the conveyance system. This study adopts the Multiphase Particle-In-Cell (MP-PIC) method to systematically investigate the characteristics of particle hydraulic transport in small inclination pipelines, focusing on particle spatial distribution, transport efficiency, and drag force models. The results indicate that the Wenyu drag model can effectively capture particle accumulation in gas-liquid environments, and pipeline transport efficiency increases with the decrease of the solid-liquid ratio. Considering the impact of particle concentration and pipeline inclination on flow velocity, a transport critical velocity model is developed and verified to have an error within 10%. Furthermore, Liutex identification method is utilized for capturing the vortex motion between the fluids and particles in three-phase flow.