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ONSET OF THERMAL CONVECTION IN A SATURATED POROUS MEDIUM: EXPERIMENT AND ANALYSIS.

Author(s) : KAVIANY M.

Type of article: Article

Summary

THE ONSET TIME OF CONVECTION IN A SATURATED POROUS MEDIUM HEATED FROM BELOW IS DETERMINED ANALYTICALLY AND EXPERIMENTALLY. BY ASSUMING LOCAL THERMAL EQUILIBRIUM BETWEEN THE FLUID AND SOLID PHASES, LINEAR AMPLIFICATION THEORY IS APPLIED TO THE GOVERNING EQUATIONS BASED ON LOCAL AVERAGING. THE ONSET TIME IS MEASURED FOR A SYSTEM COMPOSED OF GLASS BEADS AND WATER. FOUR DIFFERENT BEAD DIAMETERS ARE USED. IN ALL CASES, RELATIVELY GOOD AGREEMENT IS FOUND BETWEEN THE PREDICTED AND MEASURED RESULTS. THE EFFECT OF THE DEPTH OF THE MEDIUM ON THE ONSET TIME AND THE VALIDITY OF THE PERMEABILITY RELATION USED ARE DISCUSSED.

Details

  • Original title: ONSET OF THERMAL CONVECTION IN A SATURATED POROUS MEDIUM: EXPERIMENT AND ANALYSIS.
  • Record ID : 1985-0978
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 27 - n. 11
  • Publication date: 1984

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