Fig. 10From: An approach to hydraulic fracture in geomaterials through a porous brittle damage material modelSensitivity analysis on the initial isotropic permeability of the matrix. Black circles: \(2\times 10^{-14}~\hbox {m}^2\). Gray circles: \(2\times 10^{-16}~\hbox {m}^2\). White circles: \(2\times 10^{-18}~\hbox {m}^2\). a Fracture surface versus time. b Fracture volume versus timeBack to article page