Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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SIMULATION OF PARTICLE DISPERSION AND DEPOSITION IN FLOW AROUND TWO CIRCULAR CYLINDERS IN A SIDE-BY-SIDE ARRANGEMENT

병렬로 배열된 두 개의 원형 실린더 유동에서 입자의 분산과 부착 해석

  • Hwang, Dongjun (Dept. of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Kim, Dongjoo (Dept. of Mechanical Engineering, Kumoh National Institute of Technology)
  • 황동준 (금오공과대학교 기계공학과) ;
  • 김동주 (금오공과대학교 기계공학과)
  • Received : 2016.05.09
  • Accepted : 2016.05.31
  • Published : 2016.06.30
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Abstract

Numerical simulations are carried out for the fluid flow and particle transport around two nearby circular cylinders in a side-by-side arrangement. The present study aims to understand the effects of the particle Stokes number and the spacing between two cylinders on particle dispersion and deposition characteristics. Simulations are based on an Eulerian-Lagrangian approach where the motion of particles is calculated by a Lagrangian approach based on one-way coupling. Results show that the flow structure is very different depending on the cylinder spacing, eventually affecting the overall pattern of particle dispersion significantly. It is also found that particles with smaller Stokes number tend to be distributed more uniformly in the wake of two cylinders, being located even inside the vortex cores. Meanwhile, particle deposition is analyzed in terms of the deposition efficiency and deposition location. The deposition efficiency of particles strongly depends on the Stokes number, whereas it is slightly affected by the cylinder spacing. The deposition location gets wider as the Stokes number increases, and it becomes asymmetric about the center of each cylinder as the cylinders get close.

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References

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