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Weeks 18th-29th September

Week 21 28 sept

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RING Webinar - October 18

Webinar Marius Oct23

Abstract 
Despite continuous improvements in computational methods and facilities, numerical simulation of elastic waves still remains a challenge when taking into account fine geological features. In this context, the homogeneization method, which considerably reduces the computation cost of wave simulations, can be used. When considering these media, a way to further lighten the computational requirement consists in optimizing the mesh which supports the simulation. In this work, we present an algorithm to mesh 2D smooth media for quadrangular spectral element methods (SEM). Our meshing strategy first relies on the quadtree-based method introduced by Maréchal (2007) to adapt the size of the elements to the local minimum wavelength. During this process, we properly handle anisotropy by considering directional wavelength. Then, the second part of this work consist in using weighted Laplacian smoothing to further optimize the size of the elements to the local wavelength, which increases the global time-step and, consequently, makes SEM simulations faster. To test our method, we perform wave simulation and compared it to fine mesh that are traditionnally used with homogenized media.

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2023 RING Meeting Archive available !

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2023 RING Meeting Photo Album

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RING 2023 Newsletter

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Seminars

  • Dissolution de NAPL et transport en milieu poreux: contribution au projet QUASPER
  • Transdimensional sampling of two-dimensional layered geological models with variable slope: a proof of concept
  • Introduction to stochastic modeling in Uncertainty Quantification (UQ)
  • Seismic attenuation imaging of the feeding systems under the Toba caldera complex (Indonesia)
  • Geostatistics and machine learning: contenders or doppelgangers?
  • Internal depositional patterns in channelized systems: A brief review of the literature and modeling techniques
  • Modeling and simulating scenic landscapes
  • Comment ChatGPT révolutionne déjà les Geosciences de l'énergie
  • Asbestos : une histoire croisée de la mine et de la communauté, 1899-2023
  • Three-dimensional Bayesian Modelling of Geological and Geophysical data
  • Importance of geological setting in permanent gigaton-scale CO2 storage
  • Inverting for mechanical properties in the restoration of 2D geological structures with viscous behavior
  • Uncertainty estimation in elastic FWI images for structural interpretations
  • Can we bridge the gap between stratigraphic correlation and transdimensional inversion ? Some conceptual thoughts
  • Incremental variational approach for porous composite material with elastoplastic matrix and damage evolution: theoretical and numerical preparation
  • PEGGHy : plateforme d'expérimentation géophysique, géotechnique et hydrogéologique
  • Présentation du projet ANR DECACLIM
  • Modélisation hydromécanique des cavités salines
  • Conception des ouvrages souterrains profonds en milieux continus par un couplage entre approche numérique et fiabiliste
  • PML in elastic wave simulation
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