AuthorDavies, Bill Edward,1958-
Committee ChairEvans, D. D.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractWater movement within three unsaturated welded tuff cores was studied in response to imposed thermal gradients of approximately 5°C/cm. Bulk density and initial, transient and final water content distributions were determined each 1-cm along the cores with gamma attenuation methods. Temperatures within the cores were measured by thermocouples embedded 1.5 cm into the rock cores. Liquid return flow toward the heat source was shown by the initial and final distributions of iodide. These experiments indicated that a countercurrent of water vapor driven away from a heat source and subsequent liquid return flow can be established when a thermal gradient is present within sealed porous rock cores. A field heating experiment was also performed in a densely-welded tuff formation. At a position 0.89 meters from a 1500W heat source, the temperature increased 11.1°C and the potential decreased approximately 9 bars after heating for 94 hours.
Degree ProgramHydrology and Water Resources