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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Heat Transfer from a Porous Heat Sink by Air Jet Impingement

충돌공기제트에서의 다공성 방열기의 열전달 특성

  • 백진욱 (한국과학기술원 열유동제어연구센터) ;
  • 김서영 (한국과학기술원 열유동제어연구센터) ;
  • 강병하 (한국과학기술원 열유동제어연구센터)
  • Published : 2001.02.01
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Abstract

Experiment were carried out to investigate the heat transfer characteristics of an aluminum foam block as a porous heat sink on a heat source by a vertical air jet impingement that can be applied for electronics cooling. The performance of the aluminum foam heat sink was evaluated by the convective heat transfer coefficient on the heat source. At a fixed porosity, pore density ($\beta$) of the foam and Reynolds number Re were varied in the range of $\beta$a=10, 20, 40 PPI(Pore Per Inch) and $850\leqRe\leq25000$. A nozzle diameter and the nozzle-to-plate spacing were also varied. It was found that the convective heat transfer was enhanced by the aluminum foam heat sink with lower pore density due to relatively intensified flow through the foam block. The aluminum foam block with much reduced weight shows slightly better performance with larger Nusselt number, compared with the convectional heat sink.

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References

  1. Natn, Heat Transfer Conf. v.111 impingement cooling of electronics Hollworth, B. R.;Durbin, M.
  2. Advances in Heat Transfer v.13 Hear and mass transfer between ompinging gas jet and solid surfacs Martin;H.
  3. Thermal and Fluid Sci. v.6 Heat transfer to impinging isothermal gas and flame jets;Exp. Viskanta;R.
  4. Int.J.Heat Mass Transfer v.36 Air jet impingement hear transfer from modified surface. Hansen;L.G.;Webb;B.W.
  5. Webb;R.L. Principles of Enhanced Heat Transfer
  6. Int. J. Thermophysics v.21 Effective thermal conductivity and permeability of aluminum foam material Paek;J.W.;Kang;B.H.;Kim;S.Y.;Hyun;J.M.
  7. Accepted, J. of Heat Transfer Flow and heat transfer correlations for porous fin in a plate-fin heat exchanger Kim, S. Y.;Paek, J. W.;Kang, B. H.
  8. Cellular Solids Gibson;L.J.;Ashby;M.F.
  9. Int. J. Heat Mass Transfer v.39 Thermal enhancement in laminar channel flow with a porous block Fu, W. -S.;Huang, H. -C.;Liou, W. -Y.
  10. Proceedings if the 4th JSME-KSME Thermal engineeing Conf. Heat transfer from an aluminum foam heat sink for electronics colling Paek;J.W.;Kin;S.Y;Kang;B.H.
  11. Int. J. Heat Mass Transfer v.40 Thermal performance of different shape porous blocks under an impinging jet Fu, W. -S.;Huang, H. -C.
  12. ERG Duocel aluminum foam catalog
  13. Figliola;R.S.;Beasley;D.E. Theory and Disign for Mechanical Mesurements