A new Software Module for consideration of the hydraulic effect of freezing/thawing

Wolfram Rühaak1, Hauke Anbergen, Ingo Sass2
1 Darmstädter Exzellenz Graduiertenschule für Energiewissenschaft und Energietechnik, Technische Universität Darmstadt
2 Institut für Angewandte Geowissenschaften, Fachgebiet Angewandte Geothermie, Technische Universität Darmstadt

P 1.2 in Hydrogeology of alpine regions

Changing climate will likely change the distribution of permafrost in the Alps. Thawing (and freezing) can influence slope stability and the groundwater regime. For modeling such processes a new module for the code FEFLOW was developed which takes the effect of latent heat into account (Anbergen et al., 2014).
The module was successfully benchmarked with comparable other codes (Rühaak, et al., 2015) and will be further extended to consider also effects of mechanical stress due to the volume changes resulting from phase changes.

ANBERGEN, H., RÜHAAK, W., FRANK, J., SASS, I., 2015. Numerical simulation of a freeze-thaw-testing procedure for borehole heat exchanger grouts. - Canadian Geotechnical Journal, 52(8): 1087-1100.

RÜHAAK, W., ANBERGEN, H., GRENIER, C., MCKENZIE, J., KURYLYK, B. L., MOLSON, J., ROUX, N., SASS, I., (2015): Benchmarking numerical freeze/thaw models. - Energy Procedia, 76: 301-310.