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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

PORE SCALE SIMULATION FOR THERMO-HYDRO-MECHANICAL PROCESSES IN GEOPHYSICAL SYSTEM

Get access (open in a dialog) DOI: 10.1615/IHTC16.pma.023174
pages 8099-8108

要約

Thermo-hydro-mechanical coupled processes are often observed in geophysical system, which greatly affect the underground engineering such as nuclear waste disposal, hydraulic fracture treatment, and geothermal exploration. In these processes, rock damage commonly happens once the thermal or hydrodynamic force reaches the threshold of local strength. However, thermally or hydraulically induced damage in rock has not been fully understood, owing to the limitation of experimental observation and detection as well as the challenge in simulating complex fracturing behavior in rock with traditional continuum-based methods (such as FEM). Therefore, in this work a thermal-hydro-mechanical coupled LBM-DEM model is developed to simulate fracturing behavior of rock under thermal or hydrodynamic force. Current model is validated by comparing with analytical solution and repeating previous results in literature. Finally, two applications, hydraulic fracture and thermal gradient cracking are simulated, and the numerical results are consistent with the experimental observations.