Theory and numerical application of subsurface flow and transport for transient freezing conditions
Protective barriers are being investigated for the containment of radioactive waste within subsurface environments. Predicting the effectiveness of cryogenic barriers and near-surface barriers in temperate or arctic climates requires capabilities for numerically modeling subsurface flow and transpor...
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Pacific Northwest Laboratory
1995
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ftunivnotexas:info:ark/67531/metadc620350 2023-05-15T15:12:08+02:00 Theory and numerical application of subsurface flow and transport for transient freezing conditions White, M. D. United States. Department of Energy. 1995-04-01 10 p. Text https://doi.org/10.2172/106505 https://digital.library.unt.edu/ark:/67531/metadc620350/ English eng Pacific Northwest Laboratory other: DE95014182 rep-no: PNL-SA--25595 rep-no: CONF-9504192--1 grantno: AC06-76RL01830 doi:10.2172/106505 osti: 106505 https://digital.library.unt.edu/ark:/67531/metadc620350/ ark: ark:/67531/metadc620350 15. annual hydrology days conference, Ft. Collins, CO (United States), 3-7 Apr 1995 Radioactive Waste Disposal Radioactive Waste Facilities Heat Transfer Temperature Distribution S Codes Water Saturation 05 Nuclear Fuels Soils Freezing Multiphase Flow Containment Systems Experimental Data Design Moisture Flow Models Environmental Transport Permafrost Mass Transfer Report 1995 ftunivnotexas https://doi.org/10.2172/106505 2021-01-09T23:08:00Z Protective barriers are being investigated for the containment of radioactive waste within subsurface environments. Predicting the effectiveness of cryogenic barriers and near-surface barriers in temperate or arctic climates requires capabilities for numerically modeling subsurface flow and transport for freezing soil conditions. A predictive numerical model is developed herein to simulate the flow and transport of radioactive solutes for three-phase (water-ice-air) systems under freezing conditions. This physically based model simulates the simultaneous flow of water, air, heat, and radioactive solutes through variably saturated and variably frozen geologic media. Expressions for ice (frozen water) and liquid water saturations as functions of temperature, interfacial pressure differences, and osmotic potential are developed from nonhysteretic versions of the Brooks and Corey and van Genuchten functions for soil moisture retention. Aqueous relative permeability functions for variably saturated and variably frozen geologic media are developed from the Mualem and Burdine theories for predicting relative permeability of unsaturated soil. Soil deformations, caused by freezing and melting transitions, are neglected. Algorithms developed for predicting ice and liquid water saturations and aqueous-phase permeabilities were incorporated into the finite-difference based numerical simulator STOMP (Subsurface Transport Over Multiple Phases). Application of the theory is demonstrated by the solution of heat and mass transport in a horizontal cylinder of partially saturated porous media with differentially cooled ends, with the colder end held below the liquid water freezing point. This problem represents an essential capability for modeling cryogenic barriers in variably saturated geologic media. Report Arctic Ice permafrost University of North Texas: UNT Digital Library Arctic Corey ENVELOPE(-145.133,-145.133,-76.667,-76.667) |
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Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Radioactive Waste Disposal Radioactive Waste Facilities Heat Transfer Temperature Distribution S Codes Water Saturation 05 Nuclear Fuels Soils Freezing Multiphase Flow Containment Systems Experimental Data Design Moisture Flow Models Environmental Transport Permafrost Mass Transfer |
spellingShingle |
Radioactive Waste Disposal Radioactive Waste Facilities Heat Transfer Temperature Distribution S Codes Water Saturation 05 Nuclear Fuels Soils Freezing Multiphase Flow Containment Systems Experimental Data Design Moisture Flow Models Environmental Transport Permafrost Mass Transfer White, M. D. Theory and numerical application of subsurface flow and transport for transient freezing conditions |
topic_facet |
Radioactive Waste Disposal Radioactive Waste Facilities Heat Transfer Temperature Distribution S Codes Water Saturation 05 Nuclear Fuels Soils Freezing Multiphase Flow Containment Systems Experimental Data Design Moisture Flow Models Environmental Transport Permafrost Mass Transfer |
description |
Protective barriers are being investigated for the containment of radioactive waste within subsurface environments. Predicting the effectiveness of cryogenic barriers and near-surface barriers in temperate or arctic climates requires capabilities for numerically modeling subsurface flow and transport for freezing soil conditions. A predictive numerical model is developed herein to simulate the flow and transport of radioactive solutes for three-phase (water-ice-air) systems under freezing conditions. This physically based model simulates the simultaneous flow of water, air, heat, and radioactive solutes through variably saturated and variably frozen geologic media. Expressions for ice (frozen water) and liquid water saturations as functions of temperature, interfacial pressure differences, and osmotic potential are developed from nonhysteretic versions of the Brooks and Corey and van Genuchten functions for soil moisture retention. Aqueous relative permeability functions for variably saturated and variably frozen geologic media are developed from the Mualem and Burdine theories for predicting relative permeability of unsaturated soil. Soil deformations, caused by freezing and melting transitions, are neglected. Algorithms developed for predicting ice and liquid water saturations and aqueous-phase permeabilities were incorporated into the finite-difference based numerical simulator STOMP (Subsurface Transport Over Multiple Phases). Application of the theory is demonstrated by the solution of heat and mass transport in a horizontal cylinder of partially saturated porous media with differentially cooled ends, with the colder end held below the liquid water freezing point. This problem represents an essential capability for modeling cryogenic barriers in variably saturated geologic media. |
author2 |
United States. Department of Energy. |
format |
Report |
author |
White, M. D. |
author_facet |
White, M. D. |
author_sort |
White, M. D. |
title |
Theory and numerical application of subsurface flow and transport for transient freezing conditions |
title_short |
Theory and numerical application of subsurface flow and transport for transient freezing conditions |
title_full |
Theory and numerical application of subsurface flow and transport for transient freezing conditions |
title_fullStr |
Theory and numerical application of subsurface flow and transport for transient freezing conditions |
title_full_unstemmed |
Theory and numerical application of subsurface flow and transport for transient freezing conditions |
title_sort |
theory and numerical application of subsurface flow and transport for transient freezing conditions |
publisher |
Pacific Northwest Laboratory |
publishDate |
1995 |
url |
https://doi.org/10.2172/106505 https://digital.library.unt.edu/ark:/67531/metadc620350/ |
long_lat |
ENVELOPE(-145.133,-145.133,-76.667,-76.667) |
geographic |
Arctic Corey |
geographic_facet |
Arctic Corey |
genre |
Arctic Ice permafrost |
genre_facet |
Arctic Ice permafrost |
op_source |
15. annual hydrology days conference, Ft. Collins, CO (United States), 3-7 Apr 1995 |
op_relation |
other: DE95014182 rep-no: PNL-SA--25595 rep-no: CONF-9504192--1 grantno: AC06-76RL01830 doi:10.2172/106505 osti: 106505 https://digital.library.unt.edu/ark:/67531/metadc620350/ ark: ark:/67531/metadc620350 |
op_doi |
https://doi.org/10.2172/106505 |
_version_ |
1766342865204543488 |