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Groundwater flow and heat transport for systems undergoing freeze-thaw: Intercomparison of numerical simulators for 2D test cases
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Number of Authors: 28
2018 (English)In: Advances in Water Resources, ISSN 0309-1708, E-ISSN 1872-9657, Vol. 114, p. 196-218Article in journal (Refereed) Published
Abstract [en]

In high-elevation, boreal and arctic regions, hydrological processes and associated water bodies can be strongly influenced by the distribution of permafrost. Recent field and modeling studies indicate that a fully-coupled multidimensional thermo-hydraulic approach is required to accurately model the evolution of these permafrost-impacted landscapes and groundwater systems. However, the relatively new and complex numerical codes being developed for coupled non-linear freeze-thaw systems require verification. This issue is addressed by means of an intercomparison of thirteen numerical codes for two-dimensional test cases with several performance metrics (PMs). These codes comprise a wide range of numerical approaches, spatial and temporal discretization strategies, and computational efficiencies. Results suggest that the codes provide robust results for the test cases considered and that minor discrepancies are explained by computational precision. However, larger discrepancies are observed for some PMs resulting from differences in the governing equations, discretization issues, or in the freezing curve used by some codes.

Place, publisher, year, edition, pages
2018. Vol. 114, p. 196-218
Keyword [en]
Numerical simulation, Code benchmarking, Thermo-hydrological coupling, Permafrost, Sharp interface problems
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-154694DOI: 10.1016/j.advwatres.2018.02.001ISI: 000427410700013OAI: oai:DiVA.org:su-154694DiVA, id: diva2:1198145
Available from: 2018-04-16 Created: 2018-04-16 Last updated: 2018-04-16Bibliographically approved

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Frampton, AndrewPannetier, Romain
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