Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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NUMERICAL STUDY OF UNSTEADY HEAT TRANSFER ON MICRO HEATER UNDER HALF-CYCLE SINUSOIDAL HEAT LOAD

마이크로히터에서 반주기 정현곡선의 열부하에 의한 비정상 열전달 연구

  • Kim, M.J. (Dept. of Mechanical Engineering, Kookmin Univ.) ;
  • Lee, H.J. (Dept. of Mechanical Engineering, Kookmin Univ.)
  • Received : 2014.06.25
  • Accepted : 2014.10.07
  • Published : 2014.12.31
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Abstract

A numerical study of transient conjugate heat transfer on micro heater in a micro-channel substrate under a sinusoidal heat load was conducted. It was found that the time constant is not affected by the maximum heating magnitude of the sinusoidal heat load. However, the time constant increases with low duration of the sinusoidal heating period and low Reynolds number. Moreover, there is a threshold where a heater temperature do not reach to time constant at low thermal diffusivity, low flow rate, and low pulse duration of the sinusoidal heating. The time constant should be considered for transient convective heat transfer under transient sinusoidal heat load in a micro heat sink.

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References

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