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EXPERIMENTAL AND THEORETICAL APPROACH OF THE THERMAL CONDUCTIVITY OF WET POROUS MEDIA. 2. THEORY.

APPROCHE EXPERIMENTALE ET THEORIQUE DE LA CONDUCTIVITE THERMIQUE DES MILIEUX POREUX HUMIDES. 2. THEORIE.

Author(s) : MOYNE C., BATSALE J. C., DEGIOVANNI A.

Type of article: Article

Summary

FROM HEAT AND MASS TRANSFER BALANCES WRITTEN FOR EACH PHASE, THE AUTHORS DEDUCE AN AVERAGE ENERGY EQUATION AND A VAPOUR TRANSPORT ONE FOR THE CONTINUOUS MEDIUM < EQUIVALENT > TO THE POROUS MEDIUM. THEY OBTAIN THE HOMOGENIZED VALUES OF THE TRANSPORT COEFFICIENTS AND DETERMINE THEM IN THE CASE OF ONE-AND TWO-DIMENSIONAL PERIODIC MEDIA. THE ANALYSIS LEADS TO CLEARLY DISTINGUISH BETWEEN THE < TRUE > THERMAL CONDUCTIVITY INTRODUCED BY FOURIER'S LAW AND THE APPARENT ONE DEDUCED FROM THE TRANSFER MODEL AND IT DEFINES RIGOROUSLY THE RESISTANCE FACTOR TO GASEOUS DIFFUSION IN POROUS MEDIA. FOLLOWING THE MOST REALISTIC ASSUMPTION -FROM AN EXPERIMENTAL POINT OF VIEW -OF FULLY WET PORE WALLS, KRISCHER'S ANALYSIS IS CORRECT.

Details

  • Original title: APPROCHE EXPERIMENTALE ET THEORIQUE DE LA CONDUCTIVITE THERMIQUE DES MILIEUX POREUX HUMIDES. 2. THEORIE.
  • Record ID : 1989-1310
  • Languages: French
  • Source: International Journal of Heat and Mass Transfer - vol. 31 - n. 11
  • Publication date: 1988

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