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• W3100920497 abstract "This study presents a phase field model for brittle fracture in fluid-infiltrating vuggy porous media. While the state-of-the-art in hydraulic phase field fracture considers Darcian fracture flow with enhanced permeability along the crack, in this study, the phase field not only acts as a damage variable that provides diffuse representation of cracks or cavities, but also acts as an indicator function that separates the domain into two regions where fluid flows are governed by Stokes and Darcy equations, respectively. Since the phase field and its gradient can be respectively regarded as smooth approximations of the Heaviside function and Dirac delta function, our new approach is capable of imposing interfacial transmissibility conditions without explicit interface parametrizations. In addition, the interaction between solid and fluid constituents is modeled by adopting the concept of mixture theory, where the fluid velocities in Stokes and Darcy regions are considered as relative measures compared to the solid motion. This model is particularly attractive for coupled flow analysis in geological materials with complex microstructures undergoing brittle fracture often encountered in energy geotechnics problems, since it completely eliminates the needs to generate specific enrichment function, integration scheme, or meshing algorithm tailored for complex geological features." @default.
• W3100920497 created "2020-11-23" @default.
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• W3100920497 date "2020-01-01" @default.
• W3100920497 modified "2023-10-18" @default.
• W3100920497 title "An immersed phase field fracture model in fluid-infiltrating porous media with evolving Beavers-Joseph-Saffman condition" @default.
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• W3100920497 doi "https://doi.org/10.1051/e3sconf/202020503009" @default.
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