Drying of a heated porous medium at sub-residual saturations
Technical Report
·
OSTI ID:405201
- Univ. of Nevada, Las Vegas, NV (United States)
Moisture transport and drying phenomena in porous media can have important implications in the design of an underground repository. Humidity in areas adjacent to moist formations is particularly difficult to predict. We have shown that humidity values can easily be underpredicted in sub-residual situations when the capillary pressures are arbitrarily fixed to a maximum value by numerical modelers. It is well known that the surface tension of water decreases when the temperature increases. Therefore, the capillary pressure, which can build up the flow resistance in the porous medium, will be significantly reduced at high temperature conditions compared to what is found at lower temperatures. This will obviously result in higher flows of fluids in the porous medium which could cause more moisture to penetrate into the repository. This study focuses on drying flows at subresidual saturations when a heated boundary is applied. Our interest is to determine humidity in flows exiting the porous medium, as well as temperatures within the medium during drying.
- Research Organization:
- American Society of Civil Engineers, New York, NY (United States); American Nuclear Society, La Grange Park, IL (United States)
- OSTI ID:
- 405201
- Report Number(s):
- CONF-960421--
- Country of Publication:
- United States
- Language:
- English
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