Název: Multi-fidelity Techniques and Uncertainty Quantification for Mechanical and Transport Processes in Fractured Rock
Autoři: Březina, J. ; Exner, P. ; Špetlík, M. ; Stebel, J. ; Béreš, Michal ; Bérešová, Simona ; Sysala, Stanislav
Typ dokumentu: Výzkumné zprávy
Rok: 2024
Jazyk: eng
Edice: EURAD, svazek: EURAD - D4.7 Report describing numerical improvement and developments and their application to treat uncertainty when dealing with coupled processes
Abstrakt: The report summarizes the results achieved by teams from the Technical University of Liberec and the Institute of Geonics of the Czech Academy of Sciences, as part of Task 4 within the DONUT\nworkpackage. We introduce a parallel Bayesian inversion library based on the delayed acceptance Metropolis-Hastings method for accelerated sampling using suitable surrogate models. Then we apply\nthe library to an inverse problem, specifically the identification of the parameters to the hydro-mechanical model describing formation of the excavation disturbed zone. Additionally, we introduce a multilevel Monte Carlo method (MLMC) library, which has been effectively applied to test transport problems. We present a neural network developed for fast numerical homogenization of small-scale discrete fractures in the 2D case. This represents a crucial advancement for applying MLMC to models with discrete fracture networks. Finally, we integrate developed methods into a benchmark safety study for near-field transport.
Klíčová slova: accelerated sampling using suitable surrogate models; excavation disturbed zone; Monte Carlo method (MLMC) library
Číslo projektu: 847593
Poznámka: Související webová stránka: https://www.ejp-eurad.eu/publications/eurad-d47-report-describing-numerical-improvement-and-developments-and-their

Instituce: Ústav geoniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: https://hdl.handle.net/11104/0360997

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-668986