Fig. 11From: Modelling of flow through naturally fractured geothermal reservoirs, Taupō Volcanic Zone, New ZealandLayout of a simple test problem. In both cases A and B the pressure gradient is parallel to the Y-axis but in case B the fracture network is rotated by 90° with respect to case A. This is analogous to the procedure used to calculate the permeability anisotropy in the paperBack to article page