The Master file defines global input variables for the program. It also calls other modules (final_mesh, assign_properties, initialize_stresses, thermal_analysis_stress_evolution_hitory).
The second module final_mesh makes the geometry of a square tunnel and cylndrical heaters as shown in figure below. It also creats three shapes of seals (trapezoid, triangular and rectangular) around the tunnel. Only trapezoid shape of the seal is shown in the figure below. In order to make the seal this module calls the modules cutoff_final and grouping_flac_mesh.
The module asssign_properties assigns properties of materials in different regions of the geometry shown in figure. For example it assigns properties of rocks, concrete, heater etc.
The module initial_stresses intializes stress in different parts of the geometry. As every material has in-situ stresses, this module initilizes insitu stresses in all the materials including rock, concrete, heater etc.
The module thermal_analysis_stress_evolution_history defines theremal parameters for the thermal model and also types of equations used to solve heat transfer in solids.
The module reassignment simulates excavation process of the tunnel in rock.
After calling all these modules a final solve command is used in the Master file to solve coupled thermo-mechanical models in solids.