Diffusion of moisture into wood.A slab of dry wood of 4-inch thickness and sealed edges is exposed to air of 40% relative humidity. Assuming that the two unsealed faces of the wood immediately jump to an equilibrium moisture content of 10 lb H2O per 100 lb of dry wood, determine the time for the moisture to penetrate to the center of the slab (2inches from each face). Assume a diffusivity of water of 8.3x 10-6cm2/s.
Diffusion of moisture into wood.A slab of dry wood of 4-inch thickness and sealed edges is exposed to air of 40% relative humidity. Assuming that the two unsealed faces of the wood immediately jump to an equilibrium moisture content of 10 lb H2O per 100 lb of dry wood, determine the time for the moisture to penetrate to the center of the slab (2inches from each face). Assume a diffusivity of water of 8.3x 10-6cm2/s.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Diffusion of moisture into wood.
A slab of dry wood of 4-inch thickness and sealed edges is exposed to air of 40% relative humidity. Assuming that the two unsealed faces of the wood immediately jump to an equilibrium moisture content of 10 lb H2O per 100 lb of dry wood, determine the time for the moisture to penetrate to the center of the slab (2inches from each face). Assume a diffusivity of water of 8.3x 10
-6cm2/s.
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