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Keywords: phase change
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1229
... usually operate at acoustic frequencies by monitoring phase changes in Rayleigh backscattered light from pulses transmitted down an optical fiber. These phase changes occur due to small strain and temperature induced variations in the refractive index of the fiber. Most systems based on Rayleigh sensing...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1127
...) water becoming ice, 3) wet ground becoming frozen, 4) cement mortar hardening, etc. After demonstrating the sensing principle of the proposed sensor, several laboratory tests were performed to prove its ability to monitor the progress of phase change of water and mortar, which is of great engineering...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-031
... Characterization bitumen Upstream Oil & Gas phase state solid zone vertical stress reservoir geomechanics SAGD circulation phase change tensile stress reservoir Magnitude settlement wellbore deformation 1. INTRODUCTION Steam Assisted Gravity Drainage (SAGD) has been widely implemented...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0585
... ABSTRACT: To investigate the effects of carbon dioxide phase change on dynamic multi-fracturing process during supercritical carbon dioxide (SC-CO 2 ) fracturing, polymethyl methacrylate (PMMA) specimens of 20 × 20 × 10cm 3 are used in experiments with SC-CO 2 and water as fracturing fluids...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-142
..., it evaporates. Sometimes the thermal energy is large enough to sublimate the material. Through these phase changes the morphology of the material reshapes and its fundamental physical properties vary (see Fig. 1). This ensues in a complex, intense and short-lived dynamic. How to control it remains a hot topic...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-062
... results show that uniaxial compressive strength, tensile strength, fracture toughness increased with decreasing temperature, but elastic modulus changed little with decreasing temperature. The expansion pressure was approximately 2.43 MPa at the phase change temperature. In the cryosuction test...

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