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Numerical modelling of coupling mechanisms during freezing in porous materials
Author(s) -
Zhou Mengmeng,
Meschke Günther
Publication year - 2011
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201110239
Subject(s) - porous medium , porosity , finite element method , ground freezing , coupling (piping) , geotechnical engineering , constitutive equation , phase transition , materials science , mechanics , phase change , thermal , elasticity (physics) , engineering , thermodynamics , composite material , structural engineering , physics
Freezing of porous materials is of interest for a wide range of engineering disciplines such as civil‐, geotechnical and environmental engineering as well as food industry. The freezing process is characterized by various couplings between the phase transition and the liquid transport within the pore space, accompanied by considerable deformations. This paper presents a macroscopic three‐phase finite element model of liquid‐infiltrated porous media subjected to freezing. For the description of the associated coupled thermo‐hydro‐mechanical behavior, the governing balance equations of the problem are formulated based upon the constitutive relations derived within the framework of thermo‐poro‐elasticity. The applicability of the model is shown by a simulation example of artificial ground freezing with coupled thermal‐hydro‐mechanical processes. (© 2011 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)