Abstract
AbstractConvection-driven cooling in porous media influences thermo-poro-mechanical stresses, thereby causing deformation. These processes are strongly influenced by the presence of fractures, which dominate flow and heat transfer. At the same time, the fractures deform and propagate in response to changes in the stress state. Mathematically, the model governing the physics is tightly coupled and must account for the strong discontinuities introduced by the fractures. Over the last decade, and motivated by a number of porous media applications, research into such coupled models has advanced modelling of processes in porous media substantially. Building on this effort, this work presents a novel model that couples fracture flow and heat transfer and deformation and propagation of fractures with flow, heat transfer and thermo-poroelasticity in the matrix. The model is based on explicit representation of fractures in the porous medium and discretised using multi-point finite volume methods. Frictional contact and non-penetration conditions for the fractures are handled through active set methods, while a propagation criterion based on stress intensity factors governs fracture extension. Considering both forced and natural convection processes, numerical results show the intricate nature of thermo-poromechanical fracture deformation and propagation.
Publisher
Springer Science and Business Media LLC
Subject
General Chemical Engineering,Catalysis
Reference70 articles.
1. Aavatsmark, I.: An introduction to multipoint flux approximations for quadrilateral grids. Comput. Geosci. 6, 405–432 (2002)
2. Ágústsson, K., Flóvenz, Ó.G.: The thickness of the seismogenic crust in Iceland and its implications for geothermal systems. In: Proceedings of the World Geothermal Congress (2005). Proceedings World Geothermal Congress 2005, Antalya, Turkey (2005)
3. Axelsson, G.: Hydrology and thermomechanics of liquid-dominated hydrothermal systems in Iceland. Ph.D. thesis, Oregon State University, USA (1985)
4. Baroth, J.: Uncertainty propagation through thermo-hydro-Mechanical modelling of concrete cracking and leakage—application to containment buildings. In: Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS (2019)
5. Barton, N.: The shear strength of rock and rock joints. Int. J. Rock Mech. Min. Sci. Geomech. Abstr. 13, 255–279 (1976)
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献