Volume 43 Issue 7
Jul.  2022
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LI Liang, SHI Ruifang, LIN Jianzhong. Research on Deposition and Orientation Characteristics of Cylindrical Particles in Gas-Solid 2-Phase Turbulent Flow in Curved Tubes[J]. Applied Mathematics and Mechanics, 2022, 43(7): 707-718. doi: 10.21656/1000-0887.420320
Citation: LI Liang, SHI Ruifang, LIN Jianzhong. Research on Deposition and Orientation Characteristics of Cylindrical Particles in Gas-Solid 2-Phase Turbulent Flow in Curved Tubes[J]. Applied Mathematics and Mechanics, 2022, 43(7): 707-718. doi: 10.21656/1000-0887.420320

Research on Deposition and Orientation Characteristics of Cylindrical Particles in Gas-Solid 2-Phase Turbulent Flow in Curved Tubes

doi: 10.21656/1000-0887.420320
  • Received Date: 2021-10-25
  • Rev Recd Date: 2022-01-09
  • Publish Date: 2022-07-15
  • In the cases of Reynolds number Re=3 000~50 000, Stokes number Stk=0.1~10, Dean number De=1 400~2 800, the orientation and deposition characteristics of cylindrical particles with aspect ratio β=2~12 in turbulent flow in curved tubes were studied. The motion of cylindrical particles was described under the slender body theory combined with Newton’s 2nd law. The orientation distribution function of cylindrical particles was given by the Fokker Planck equation. The mean velocity of the flow was obtained by solving the Reynolds-averaged Navier-Stokes equation and the Reynolds stress equation. The turbulent fluctuating velocity acting on particles was described with the kinetic simulation sweeping model. By solving the equations of the turbulent flow, the particle motion and the orientation distribution function, the orientation distributions of particles on the cross sections in different axial positions and the outlet were obtained and analyzed. The effects of various parameters on the deposition rate of particles were discussed. The results showed that, the main axis of particles turns toward the flow direction with the increase of Stk and β, and the decrease of De and Re. The deposition rate of particles increases with De, Re and β. However, it shows a non-monotonic trend with the change of Stk

    . The work has reference values for practical engineering application.

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