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Impact of considering the effects of latent heat on caldera-hosted hydrothermal systems

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Show simple item record Barnard, Melissa 2010-10-26T18:27:44Z 2010-10-26T18:27:44Z 2010-10-26
dc.description.abstract To investigate the thennal effects of latent heat in hydrothennal settings, an extension was made to the existing finite-element numerical modelling software, Aquarius. The latent heat algorithm was validated using a series of column models, which analysed the effects of penneability (flow rate), thennal gradient, and position along the two-phase curve (pressure). Increasing the flow rate and pressure increases displacement of the liquid-steam boundary from an initial position detennined without accounting for latent heat while increasing the thennal gradient decreases that displacement. Application to a regional scale model of a caldera-hosted hydrothennal system based on a representative suite of calderas (e.g., Yellowstone, Creede, Valles Grande) led to oscillations in the model solution. Oscillations can be reduced or eliminated by mesh refinement, which requires greater computation effort. Results indicate that latent heat should be accounted for to accurately model phase change conditions in hydrothennal settings. en_US
dc.language.iso eng en_US
dc.publisher Brock University en_US
dc.subject Geothermal resources en_US
dc.subject Hydrothermal alteration en_US
dc.subject Calderas en_US
dc.title Impact of considering the effects of latent heat on caldera-hosted hydrothermal systems en_US
dc.type Electronic Thesis or Dissertation en_US M.Sc. Earth Sciences en_US Masters en_US
dc.contributor.department Department of Earth Sciences en_US Faculty of Mathematics and Science en_US

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