Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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The Buoyancy Effects in Horizontal Porous Layers with Vortical Through Flow

수직 투과 흐름이 있는 수평 다공질 유체층에서의 부력 효과

  • Kim, Min-Chan (Department of Chemical Engineering, Cheju National University) ;
  • Kim, Sin (Department of Nuclear and Energy Engineering, Cheju National University) ;
  • Yoon, Do-Young (Department of Chemical Engineering, Kwangwoon University) ;
  • Kim, Sae-Hoon (Department of Ceramic Engineering, Kangnung National University)
  • 김민찬 (제주대학교 화학공학과) ;
  • 김신 (제주대학교 에너지공학과) ;
  • 윤도영 (광운대학교 화학공학과) ;
  • 김세훈 (강릉대학교 세라믹공학과)
  • Published : 2001.09.01
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Abstract

Buoyancy-driven natural convection is analysed by employing a linear stability theory in hori-zontal porous media with net through flow. Darcy's law is used to model the flow characteristics in porous media. Bated on the results of linear stability analysis, a heat transfer correlation was obtained by employing weakly nonlinear analysis. As the net through flow increases, the system becomes more stable and the effect of the Darcy-Rayleigh number on the Nusselt number decreases.

투과 흐름이 있는 수평 다공질 유체층에서 부력에 의하여 발생하는 자연대류 현상을 선형 안정성 이론을 사용하여 해석하였다. 다공질 층에서의 유동 특성을 나타내기 위하여 Dacrcy 법칙을 사용하였다. 선형 안정성 해석 결과를 근거로 자연대류 발생점 근처에서 비선형 해석을 하여 열전달 상관관계를 얻었다. 해석 결과 투과 흐름의 세기가 커짐에 따라 계는 점점 안정해 지고, Darcy-Rayleigh수의 변화에 따른 Nusselt수의 변화는 감소하였다.

Keywords

References

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