Fig. 7
From: Thermally driven fracture aperture variation in naturally fractured granites
Evolution of hydraulic apertures. a Step-wise heating experiments (\(\#\)N14-S1, \(\#\)N14-S2, and \(\#\)N14-S3) using Specimen N14 under 3 different confining stresses (20, 30, and 40Â MPa). Inset: discrete hydraulic apertures at steady-state conditions. b Constant-rate heating experiments (\(\#\)N19-C1, \(\#\)N19-C2) using Specimen N19 under 2 different confining stresses (20Â and 30Â MPa). All experiments were performed with a pore-fluid pressure of 15Â MPa