Journal
ADVANCES IN WATER RESOURCES
Volume 114, Issue -, Pages 196-218Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.advwatres.2018.02.001
Keywords
Numerical simulation; Code benchmarking; Thermo-hydrological coupling; Permafrost; Sharp interface problems
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Funding
- CEA
- INSU / EC2CCO
- IPSL
- IPA as IPA Action Group
- NERC [bgs05007] Funding Source: UKRI
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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. (C) 2018 Elsevier Ltd. All rights reserved.
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