A coupled thermoporoelastic model with thermo-osmosis and thermal-filtration

A coupled thermoporoelastic model accounting for compressibility and thermal expan! sion of constituents\ convective heat ~ow and changing porosity and related properties of a saturated soil is presented[ The model also considers thermodynamically coupled water and heat ~ow "thermal! _ltration and thermo!osmosis that are analogous to Sore t and Dufour e}ects in solutions#[ These coupling e}ects are reported to be signi_cant in the case of semi!impermeable clay barriers used in waste repositories[ The governing equations derived in terms of displacements\ temperature and pore water pressure are non!linear[ A mixed _nite element formulation is presented to obtain numerical solutions[ An exact analytical solution for a 0!D soil column is presented for a simpli_ed linear case that includes thermodynamic coupling[ Selected numerical solutions for soil columns and radially symmetric plane strain problems are presented to demonstrate the principle features of the coupled model and the signi_cance of thermodynamic coupling[ 0887 Elsevier Science Ltd[ All rights reserved[