Ice-water-soil coupled mixture theory and Isogeometric FEM

When water in the ground transforms into ice, force equilibrium, conservation of mass, and conservation of energy with consideration of latent heat exist for the three phases of soil, water, and ice, and there are interactions among them. In this study, the governing equations for such a soil-water-ice three-phase mixture are formulated.

The above mixture theory was successfully applied to Isogeometric FEM, which represents complex geometries with a small number of nodes and elements, by using the NURBS function as the shape function of the finite element method. (joint researcher in charge)

Kyokawa, H. and Bekele, Y.W. : Numerical simulation of thermos-hydro-mechanically coupled processes during ground freezing and thawing, 14th IACMAG, Kyoto, Japan, USB pp.379-384, 2014.

Bekele Y.W., Kyokawa, H., Kvariving, A. M., Kvamsdal, T. and Nordal, S. : Isogeometric Analysis of THM Coupled Processes in Ground Freezing, Computers and Geotechnics, Vol. 88, pp. 129-145, 2017.