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• W2282472050 abstract "The present work concerns the mechanics of porous media and focuses on the development of a thermo-poro-elastic model, with particular emphasis on the simulation of fluid injection/pumping operations into geological formations. A non-linear model for coupled fluid flow and heat transfer in saturated porous media has been developed based on Mixed Hybrid Finite Elements (MHFEs) and Finite Volumes (FV). In particular, the MHFE discretization for the flow equation leads to an element-wise mass-conservative scheme, providing an accurate discrete velocity field. In the heat transfer equation, a time-splitting tecnique has been used solving separately the convective term by means of a FV scheme, and the conductive term by the MHFE method. The model can simulate problems characterized by very sharp temperature fronts, introducing no spurious oscillation in the numerical solution and negligible numerical diffusion, and does not required an excessive mesh resolution in order to ensure accuracy and stability. A fully coupled 3-D Mixed Finite Element model has also been developed for the numerical solution to the Biot equations of 3-D consolidation, combining Mixed Finite Elements (MFEs) and traditional Finite Elements (FEs) to discretize the fluid flow and the structural equilibrium equations, respectively. MFEs are used in order to alleviate the pore pressure numerical oscillations at the interface between materials with different permeabilities. An ad hoc solution algorithm based on conjugate gradients is implemented that takes advantage of the block structure of the discretized problem. The proposed models have been validated against well-known analytical solutions, and successfully experimented with in engineering applications." @default.
• W2282472050 created "2016-06-24" @default.
• W2282472050 creator A5060993391 @default.
• W2282472050 date "2010-01-01" @default.
• W2282472050 modified "2023-09-24" @default.
• W2282472050 title "Thermoporoelastic Modelling of Deep Aquifer Injection and Pumping by Mixed Finite Elements and Finite Volumes" @default.
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