Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Numerical Analysis of Heat Transfer System Using a Symmetric Flexible Vortex Generator in a Poiseuille Channel Flow

대칭 형태로 기울어진 와류 생성기를 이용한 열전달 시스템 수치 해석

  • Kim, Jeonghyeon (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology) ;
  • Park, Sung Goon (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
  • Received : 2020.03.20
  • Accepted : 2020.04.29
  • Published : 2020.04.30
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Abstract

Flexible structures have been adopted in heat transfer systems as vortex generators. The flexible vortex generators immersed in a flow show a self-sustained oscillatory motion, which enhances fluid mixing and heat transfer. In the present study, the vortex generators in a two-dimensional channel flow are numerically investigated, and they are symmetrically mounted on the upper and lower walls with an inclination angle. The momentum interaction and heat transfer between the flexible vortex generators and the surrounding fluid are considered by using an immersed boundary method. The inclination angle is one of the important factors in determining the flapping kinematics of the flexible vortex generators. The flapping amplitude increases as the inclination angle increases, thereby enhancing fluid mixing. The heat transfer is enhanced up to 80% comparing to the baseline channel flow.

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References

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