Groundwater flow and heat transport for systems undergoing freeze-thaw: intercomparison of numerical simulators for 2D test cases

Grenier, Christophe; Anbergen, Hauke; Bense, Victor; Chazny, Quentin; Coon, Ethan; Collier, Nathaniel; Costard, Francois; Ferry, Michel; Frampton, Andrew; Frederick, Jennifer; Goncalves, Julio; Holmen, Johann; Jost, Anne; Kokh, Samuel; Kurylyk, Barret; McKenzie, Jeffrey; Molson, John; Mouche, Emmanuel; Orgogozo, Laurent; Pannetier, Romain; Rivere, Agnes; Roux, Nicolas; Ruhaak, Wolfram; Scheidegger, Johanna; Selroos, Jan-Olof; Therrien, Rene; Vidstrand, Patrik; Voss, Clifford. 2018 Groundwater flow and heat transport for systems undergoing freeze-thaw: intercomparison of numerical simulators for 2D test cases. Advances in Water Resources, 114. 196-218. 10.1016/j.advwatres.2018.02.001

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Abstract/Summary

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 evolu- tion 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.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/j.advwatres.2018.02.001
ISSN:	03091708
Additional Keywords:	GroundwaterBGS, Groundwater, Groundwater modelling
Date made live:	06 Mar 2018 09:27 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/519472

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1016/j.advwatres.2018.02.001

ISSN:

03091708

Additional Keywords:

GroundwaterBGS, Groundwater, Groundwater modelling

Date made live:

06 Mar 2018 09:27 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/519472