Reduced Order Models for THM Coupled System in Geological Porous Media

                                                                                                                                                                                                                                Ygee Larion received his bachelor’s degree in civil engineering at University of the Philippines and master’s degree in civil and environmental engineering at Sejong University (South Korea). He started his PhD in September 2017 under the SEED program with Université Libre de Bruxelles (Belgium) and Universitat Politècnica de Catalunya (Spain) as his primary and secondary institution, respectively. His research is focused on applying reduced order modelling (ROM) techniques to problems related to underground nuclear waste repository.

In a large number of geo-environmental applications, coupled processes have to be modelled considering uncertainties of several material properties and geometrical parameters. For safety assessment and design optimization of underground nuclear waste repository, thermo-hydro-mechanical (THM) coupled processes are among others, key effects to consider. On specific problems involving multiple queries (model calibration based on partial information and site measurements) and fast queries (investigation of field behavior with varying parameters for fast decision-making), it is advantageous to use reduced order models to alleviate the computational burden. In this talk, applications of snapshot-based ROM to large-scale models relevant to underground nuclear waste repository will be demonstrated: (1) Parameter variation on geological porous media (THM coupled system) subjected to advancing glacier (2) Inverse parameter identification based on actual underground heater experiment.