Mathematical modeling of near-critical convection

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Fluid and heat flow at temperatures approaching or exceeding that at the critical point (374ºC for pure water, higher for saline fluids) may be encountered in deep zones of geothermal systems and above cooling intrusives. Laboratory experiments have demonstrated strong enhancements in heat transfer at near-critical conditions (Dunn and Hardee, 1981). We have developed special numerical techniques for modeling porous flow at near-critical conditions, which can handle the extreme non-linearities in water properties near the critical point. Our numerical experiments show strong enhancements of convective heat transfer at near-critical conditions; however, the heat transfer rates obtained in the numerical simulations ... continued below

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173-180

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Cox, B. L.; Pruess, K. & McKibbin, R. January 1, 1988.

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Fluid and heat flow at temperatures approaching or exceeding that at the critical point (374ºC for pure water, higher for saline fluids) may be encountered in deep zones of geothermal systems and above cooling intrusives. Laboratory experiments have demonstrated strong enhancements in heat transfer at near-critical conditions (Dunn and Hardee, 1981). We have developed special numerical techniques for modeling porous flow at near-critical conditions, which can handle the extreme non-linearities in water properties near the critical point. Our numerical experiments show strong enhancements of convective heat transfer at near-critical conditions; however, the heat transfer rates obtained in the numerical simulations are considerably smaller than those seen in the laboratory experiments by Dunn and Hardee. We discuss possible reasons for this discrepancy and develop suggestions for additional laboratory experiments.

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173-180

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  • Proceedings, thirteenth workshop on geothermal reservoir engineering, Stanford University, Stanford, CA, January 19-21, 1988

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  • Report No.: SGP-TR-113-25
  • Grant Number: AS07-84ID12529
  • Office of Scientific & Technical Information Report Number: 887213
  • Archival Resource Key: ark:/67531/metadc885805

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1988

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  • Sept. 21, 2016, 2:29 a.m.

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  • April 16, 2018, 3:02 p.m.

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Cox, B. L.; Pruess, K. & McKibbin, R. Mathematical modeling of near-critical convection, article, January 1, 1988; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc885805/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.