A continuum voxel approach to model flow in 3D fault networks: A new way to obtain up-scaled hydraulic conductivity tensors of grid cells

JOURNAL OF HYDROLOGY

卷:493

Article

Fourno, Andre¹  Grenier, Christophe²  Benabderrahmane, Abdelhakim³  Delay, Frederick⁴ 

[1] IFP Energies Nouvelles, F-92500 Rueil Malmaison, France

[2] CEA Orme Merisiers, Lab Sci Climat & Environm, UMR CNRS CEA UVSQ 8212, F-91191 Gif Sur Yvette, France

[3] DRD EAP, ANDRA, F-92298 Chatenay Malabry, France

[4] UMR CNRS 7517, LHyGeS, F-67084 Strasbourg, France

关键词: Fractured media;    Up-scaling;    Equivalent hydraulic conductivity tensors;    Mixed hybrid finite elements;   

DOI  :  10.1016/j.jhydrol.2013.04.010

来源: Elsevier

【 摘 要 】

Modelling transfers in fractured media remains a challenging task due to the complexity of the system geometry, high contrasts and large uncertainties on flow and transport properties. In the literature, fractures are classically modelled by equivalent properties or are explicitly represented. The new Fracture Continuum Voxel Approach (FCVA), is a continuum approach partly able to represent fracture as discrete objects; the geometry of each fracture is represented on a regular meshing associated with a heterogeneous field of equivalent flow properties. The mesh-identification approach is presented for a regular grid. The derivation of equivalent voxel parameters is developed for flow simulated with a Mixed Hybrid Finite Element (MHFE) scheme. The FCVA is finally validated and qualified against some reference cases. The resulting method investigates multi-scaled fracture networks: a small scale homogenised by classical methods and large discrete objects as that handled in the present work. (C) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

Free