Self-similar temperature, pressure and moisture distributions within an intensely heated porous half space

Abraham Dayan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

A model for the transient heat and mass transfer within an intensely heated porous half space is presented. The model is based on three principal transport phenomena: heat conduction, vapor convection under pressure gradients and the evaporation-recondensation mechanism. Local liquid-vapor equilibrium is assumed. The governing equations consist of two sets: one for the porous region that has dried and one for the remaining moist region. A self-similar solution is obtained for the combination of uniform initial conditions with a step change in boundary conditions. Transient temperature, pressure and moisture distributions are described in closed form for the dry region and numerically for the moist region. The model was applied to study the rate of moisture loss from a drying concrete wall. The results correspond well with results of previously reported investigations.

Original languageEnglish
Pages (from-to)1469-1476
Number of pages8
JournalInternational Journal of Heat and Mass Transfer
Volume25
Issue number10
DOIs
StatePublished - Oct 1982

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