Abstract
The THHMD model is a thermo-hydro-mechanical damage model dedicated to unsaturated rocks. The present article questions one of the postulates of the model's formulation, namely using the same Representative Elementary Volume (REV) to define the crack density tensor and to compute the damaged permeability. In this study a drained triaxial compression test is simulated by considering that the REV's dimension (noted b) is a flow internal length. We show that the length b can be used to scale the influence of damage on permeability. Secondly, a nuclear waste repository is modeled. Multiphase flow is studied in fractured porous bedrock subjected to heating. It is demonstrated that (1) the THHMD model is mesh-independent, (2) b can be considered as the homogenization scale necessary to define the damage field, and (3) the model can be improved by adding one internal length parameter in the formulation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Special Topics & Reviews in Porous Media - An International Journal
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
