A model for non-isothermal variably saturated porous media in dynamics

Lorenzo Sanavia, Duc Toan Cao, Mareva Passarotto, Bernhard A. Schrefler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

This work presents the development of a fully coupled mathematical and numerical model for the analysis of the thermo-hydro-mechanical behaviour of non-isothermal multiphase porous materials in dynamics. The model is developed following Lewis and Schrefler within the Hybrid Mixture theory [1]. The porous medium is treated as a multiphase system composed of a solid skeleton with open pores, filled with liquid water and gas. The solid is considered as deformable and non-polar. All the fluids are in contact with the solid phase. The constituents are assumed to be isotropic, homogeneous, immiscible, except for dry air and water vapour and chemically non-reacting. Local thermal equilibrium between the solid matrix, gas and liquid phases is assumed. Heat conduction, vapour diffusion, heat convection, liquid water flow due to pressure gradients or capillary effects and water phase change (evaporation and condensation) inside pores are all taken into account. In the partially saturated zones, liquid water is separated from its vapour by a meniscus concave toward gas (capillary water). In order to analyse the thermo-hydro-mechanical behaviour of a soil structure in the low frequency domain, e.g. under earthquake excitation, the u-p formulation is advocated for the finite element discretization.

Original languageEnglish (US)
Title of host publication11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014
PublisherInternational Center for Numerical Methods in Engineering
Pages3473-3482
Number of pages10
ISBN (Print)9788494284472
StatePublished - Jul 1 2014
EventJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014 - Barcelona, Spain
Duration: Jul 20 2014Jul 25 2014

Other

OtherJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014
CountrySpain
CityBarcelona
Period7/20/147/25/14

Keywords

  • Dynamics
  • Finite element method
  • Hydro-Thermo-Mechanical processes
  • Unsaturated porous materials

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Theory and Mathematics
  • Computer Science Applications
  • Mechanical Engineering

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