Author/Authors :
Zhao، نويسنده , , Zhihong and Rutqvist، نويسنده , , Jonny and Leung، نويسنده , , Colin and Hokr، نويسنده , , Milan and Liu، نويسنده , , Quansheng and Neretnieks، نويسنده , , Ivars and Hoch، نويسنده , , Andrew and Havl??ek، نويسنده , , Ji?? and Wang، نويسنده , , Yuan and Wang، نويسنده , , Zhen and Wu، نويسنده , , Yuexiu and Zimmerman، نويسنده , , Robert، نويسنده ,
Abstract :
This paper compares numerical modeling of the effect of stress on solute transport (advection and matrix diffusion) in fractured rocks in which fracture apertures are correlated with fracture lengths. It is mainly motivated by the performance and safety assessments of underground radioactive waste repositories. Five research teams used different approaches to model stress/deformation, flow and transport processes, based on either discrete fracture network or equivalent continuum models. The simulation results derived by various teams generally demonstrated that rock stresses could significantly influence solute transport processes through stress-induced changes in fracture apertures and associated changes in permeability. Reasonably good agreement was achieved regarding advection and matrix diffusion given the same fracture network, while some observed discrepancies could be explained by different mechanical or transport modeling approaches.
Keywords :
fractured rocks , Solute transport , Discrete element method , Equivalent continuum , Dual-porosity model , Particle tracking method
