Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Numerical Study of The Motion of a Circular Cylinder Suspended in a Square Enclosure

사각 밀폐계 내 자연대류에 의한 원형 실린더의 운동 특성에 관한 수치적 연구

  • Son, Seong-Wan (School of Mechanical Engineering, Pusan National University) ;
  • Jeong, Hea-Kown (Technical Research Laboratories, POSCO) ;
  • Ha, Man-Yeong (School of Mechanical Engineering, Pusan National University) ;
  • Yoon, Hyun-Sik (Advanced Ship Engineering Research Center, Pusan National University)
  • Received : 2010.04.20
  • Published : 2010.11.10
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Abstract

The present study numerically investigates the motion of a solid body suspended in the square enclosure with natural convection. A two-dimensional circular cylinder levitated thermally has been simulated by using thermal lattice Boltzmann method(TLBM) with the direct-forcing immersed boundary method. To deal with the ascending, falling or levitation of a circular cylinder in natural convection, the immersed boundary method is expanded and coupled with the TLBM. The circular cylinder is located at the bottom of a square enclosure with no restriction on the motion and freely migrates due to the Boussinesq approximation which is employed for the coupling between the flow and temperature fields. For different density ratio between the cylinder and the fluid, the motion characteristics of the circular cylinder for various Grashof numbers have been carried out. The Prandtl number is fixed as 0.7.

Keywords

References

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