Isogeometric analysis of THM coupled processes in ground freezing. (August 2017)

• Record Type: Journal Article
• Authors: Bekele, Yared W.; Kyokawa, Hiroyuki; Kvarving, Arne M.; Kvamsdal, Trond; Nordal, Steinar
• Is Part Of: Computers and geotechnics. Volume 88(2017)
• Page Start: 129
• Page End: 145
• Publication Date: 2017-08
• Subjects: Isogeometric analysis -- THM coupling -- Porous media -- Ground freezing; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2017.02.020
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: An isogeometric analysis (IGA) based numerical model is presented for simulation of thermo-hydro-mechanically (THM) coupled processes in ground freezing. The momentum, mass and energy conservation equations are derived based on porous media theory. The governing equations are supplemented by a saturation curve, a hydraulic conductivity model and constitutive equations. Variational and Galerkin formulation results in a highly nonlinear system of equations, which are solved using Newton-Raphson iteration. Numerical examples on isothermal consolidation in plane strain, one-dimensional freezing and heave due to a chilled pipeline are presented. Reasonably good agreements were observed between the IGA based heave simulations and experimental results.