![]() ![]() Models are discussed for the solid deformation, fluid flow, and fracture propagation. The paper is organized as follows: After a short description of the laboratory part of the joint project in Section 2, the governing equations for a hydraulic fracture problem in its basic form are presented in Section 3. Given the explicit interface, the level-set functions for each propagation step can be calculated straightforward. In contrast, the explicit crack description is used to perform the crack update. The implicit description is given by three level-set functions defined in and enables a simple evaluation of the enrichments. An XFEM approach in combination with an explicit and implicit crack description is applied to a plane-strain hydraulic fracture problem. However, the focus of the present paper will lie on the progress in using XFEM for hydraulic fracture modeling. The developed numeric model will be verified against large-scale laboratory experiments. It enables, thereby, the accurate approximation of fields that involve jumps, kinks, singularities, and other non-smooth features within elements. The XFEM allows for the consideration of a priori knowledge about the solution of a hydraulic fracture problem into the approximation space through the addition of enrichment functions. ![]() It has been applied to various problems within the area of fracture mechanics. The extended finite element method (XFEM) forms a good basis for this. The extension to more complex fracture scenarios as well as the integration with other software for risk assessment simulations requires a computer resource moderate modeling of fracture propagation. Yet this engineering of the heat exchanger has to be improved such that the outcome can be predicted within specified uncertainties. Water can be let circulate between the two wells, heat up while passing through the hot rock and be cooled down on the surface for power generation. Enhanced Geothermal System (EGS) propose to engineer the controlled creation of a heat exchanger between two wells in deep hot rocks, increasing the number of possible locations on earth. This is valid for only a few locations on earth. The large scale conversion of geothermal energy into electrical energy using natural formations as heat exchangers depends on the coincidental occurrence of heat, fluid and permeability. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
March 2023
Categories |