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RESEARCH PAPERS: Transport in Porous Media

Effects of Moisture on Temperature During Drying of Consolidated Porous Materials

[+] Author and Article Information
F. Kallel, N. Galanis

Département de génie mécanique, Université de Sherbrooke, Sherbrooke, Québec, Canada

B. Perrin, R. Javelas

Laboratoire de génie civil, Institut National des Sciences appliquées, Toulouse, France

J. Heat Transfer 115(3), 724-733 (Aug 01, 1993) (10 pages) doi:10.1115/1.2910744 History: Received August 01, 1991; Revised December 01, 1992; Online May 23, 2008

Abstract

A one-dimensional model for simultaneous heat and moisture transfer in consolidated porous materials is solved for homogeneous brick and mortar slabs. It is validated by comparing numerically predicted moisture content and temperature evolutions with corresponding measured values. It correctly predicts that initially saturated slabs at 20°C which are suddenly placed in contact with air at 20°C and a relative humidity of 50 percent undergo a rapid transient reduction of their temperature down to 13°C due to the evaporation of excess water content. The model is used to study the effets of the initial moisture content and convection transfer coefficients on the minimum temperature of the slabs and on the duration of the transient.

Copyright © 1993 by The American Society of Mechanical Engineers
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