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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Flow Control and Heat Transfer Enhancement from a Heated Block by an Inflow Pulsation (I) Flow Field Computation

입구 유동 가진에 의한 사각 발열체 주위의 유동제어 및 열전달촉진 (I) 유동장 수치해석

  • 리광훈 (서울시립대학교 기계정보공학과) ;
  • 김서영 (KIST 열유동제어연구센) ;
  • 성형진 (한국과학기술원 기계공학과)
  • Published : 2002.07.01
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Abstract

The characteristics of a pulsating flow field from a heated block representing heat-dissipating electronic component in a channel have been numerically investigated. At the channel inlet a pulsating sinusoidal flow is imposed. The Reynolds number based on the channel height (H) is fixed at Re=500, and the forcing frequency is varied in the range of $0\leqSt\leq2$. Numerical results on the time-dependent flow field are obtained and averaged over a cycle of pulsation. The effect of the important governing parameters such as the Strouhal number is investigated in detail. The results indicate that the recirculating flow behind the block is substantially affected by the pulsation frequency. To characterize the periodic vortex shedding due to the inflow pulsation, numerical flow visualizations are carried out.

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References

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