The use of volume-averaging techniques to predict temperature transients due to water vapor sorption in hygroscopic porous polymer materials
✍ Scribed by Phillip Gibson; Majid Charmchi
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 343 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Volume-averaging techniques developed for modeling drying processes in porous materials offer a convenient framework for analyzing vapor sorption in porous hygroscopic polymeric materials. Because of the large temperature changes associated with water vapor sorption in these materials (from 10Њ to 20ЊC), sorption/diffusion processes are best characterized through the coupled differential equations describing both the transport of energy and mass through the porous structure. Experimental and numerical results are compared for a variety of natural and man-made porous polymeric materials (textiles) using the volume-averaging technique. Boundary heat and mass transfer coefficients and assumptions about thermal radiative properties of the experimental apparatus are shown to influence results obtained with the numerical solution method.