Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió acceptadaData de publicació
Llicència de publicació
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/207171
3D magnetotelluric modeling using high-order tetrahedral Nédélec elements on massively parallel computing platforms
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
We present a routine for 3D magnetotelluric (MT) modeling based upon high-order edge finite element method (HEFEM), tailored and unstructured tetrahedral meshes, and high-performance computing (HPC). This implementation extends the PETGEM modeller capabilities, initially developed for active-source electromagnetic methods in frequency-domain. We assess the accuracy, robustness, and performance of the code using a set of reference models developed by the MT community in well-known reported workshops. The scale and geological properties of these 3D MT setups are challenging, making them ideal for addressing a rigorous validation. Our numerical assessment proves that this new algorithm can produce the expected solutions for arbitrarily 3D MT models. Also, our extensive experimental results reveal four main insights: (1) high-order discretizations in conjunction with tailored meshes can offer excellent accuracy; (2) a rigorous mesh design based on the skin-depth principle can be beneficial for the solution of the 3D MT problem in terms of numerical accuracy and run-time; (3) high-order polynomial basis functions achieve better speed-up and parallel efficiency ratios than low-order polynomial basis functions on cutting-edge HPC platforms; (4) a triple helix approach based on HEFEM, tailored meshes, and HPC can be extremely competitive for the solution of realistic and complex 3D MT models and geophysical electromagnetics in general.
Matèries (anglès)
Citació
Citació
CASTILLO REYES, Octavio, MODESTO, David, QUERALT I CAPDEVILA, Pilar, MARCUELLO PASCUAL, Alejandro, LEDO FERNÁNDEZ, Juanjo, AMOR-MARTIN, Adrian, DE LA PUENTE, Josep, GARCÍA-CASTILLO, Luis emilio. 3D magnetotelluric modeling using high-order tetrahedral Nédélec elements on massively parallel computing platforms. _Computers & Geosciences_. 2022. Vol. 160. [consulta: 20 de gener de 2026]. ISSN: 0098-3004. [Disponible a: https://hdl.handle.net/2445/207171]