A fully coupled constitutive model for thermo-hydro-mechanical analysis in elastic media with double porosity

摘要

The partial differential equations governing nonisothermal flow and deformation in an elastic medium with double porosity are presented. The governing equations satisfy an effective stress concept, Darcy’s law, Fourier’ law and the equations of Hookean thermoelasticity. The equations are derived using a systematic macroscopic approach that satisfies conservation laws applicable to balance of linear momentum, mass and energy. The Thermo-Hydro-Mechanical coupling take into account processes associated with: thermal expansion, thermal convection by moving fluid, fluid flux due to temperature gradients, heat flux due to pressure gradients, fluid and heat exchange between the two pore system, and the heat of phase compression. INDEX TERMS: 5104 Physical Properties of Rocks: Fracture and flow; 5114 Physical Properties of Rocks: Permeability and porosity; 5134 Physical Properties of Rocks: Thermal properties; 5199 Physical Properties of Rocks: General or miscellaneous; 9810 General or Miscellaneous: New fields (not classifiable under other headings).