Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Simulation of the Particle Deposition on a Circular Cylinder in High-Temperature Particle-Laden Flow

원형 실린더 주위의 고온 유동에서 입자의 부착 해석

  • Jeong, Seok-min (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Kim, Dongjoo (Department of Mechanical Engineering, Kumoh National Institute of Technology)
  • 정석민 (금오공과대학교 기계공학과) ;
  • 김동주 (금오공과대학교 기계공학과)
  • Received : 2018.12.12
  • Accepted : 2019.01.03
  • Published : 2019.02.28
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Abstract

Numerical simulations are performed for the thermal fluid flow around a circular cylinder, and the particle trajectories are calculated to investigate the particle motions and deposition characteristics. We aim to understand the effects of three important parameters (particle Stokes number, temperature difference in the flow and on the cylinder surface, and thermal conductivity ratio between the fluid and the particles) on the deposition efficiency. The results show that the thermophorectic effect is insignificant for particles with large Stokes numbers, but it affects particles with small Stokes numbers. The deposition efficiency increases with the increase in temperature difference between the flow and the cylinder or the decrease in ratio of thermal conductivity of the particles to the fluid. When thermophoresis becomes significant, the particles are deposited even on the back side of the cylinder.

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References

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