Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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The Onset of Natural Convection and Heat Transfer Correlation in Horizontal Fluid Layer Heated Uniformly from Below

  • Kim, Min-Chan (Department of Chemical Engineering Cheju National University) ;
  • Kim, Sin (Department of Nuclear and Energy Engineering Cheju National University)
  • Published : 2001.10.01
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Abstract

The critical condition of the onset of buoyancy-driven convective motion of uniformly heated horizontal fluid layer was analysed by the propagation theory which transforms the disturbance quantities similarly. The dimensionless critical time, $\tau$$\sub$c/, is obtained as a function of the Rayleigh number and the Prandtl number. Based on the stability criteria and the boundary-layer instability model, a new heat transfer correlation which can cover whole range of Rayleigh number was derived. Our theoretical results predict the experimental results quite reasonably.

Keywords

References

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