LYNX

LYNX (Lithosphere dYnamics Numerical toolboX) is a novel numerical simulator for modelling thermo-poromechanical coupled processes driving the deformation dynamics of the lithosphere.

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Cite this software

What LYNX can do for you

LYNX in a nutshell

LYNX (Lithosphere dYnamics Numerical toolboX) is a multiphysics modelling solution developed within the Subsurface Process Modelling Section at GFZ Potsdam. LYNX is based on the flexible, object-oriented numerical framework MOOSE, which provides a high-level interface to state of the art nonlinear solver technology. LYNX is a novel numerical simulator for modelling thermo-poromechanical coupled processes driving the deformation dynamics of the lithosphere. The formulation adopted in LYNX relies on an efficient implementation of a thermodynamically consistent visco-elasto-plastic rheology with anisotropic porous-visco-plastic damage feedback. The main target is to capture the multiphysics coupling responsible for semi-brittle and semi-ductile behaviour of porous rocks as also relevant to strain localization and faulting processes. More information on the governing equations, their derivation and their implementation together with a list of synthetic and real case applications can be found in Jacquey and Cacace (2020a) and Jacquey and Cacace (2020b).

Modelling of the seismic cycle with a realistic elasto-visco-plastic off-fault rheology

Modelling of the seismic cycle with a realistic elasto-visco-plastic off-fault rheology.

LYNX has been coded following the concept of object-orientation thus providing a flexible modular structure within easy to be extended modules by the user. It also features geometric agnosticism and hybrid parallelism with proven scalability on HPC architectures. LYNX is based on a realistic physics-based rheological description of lithosphere deformation dynamics based on an explicit incorporation of the lithosphere visco-elasto-plastic rheology including nonlinear feedback effects from the energetics of the system and its extension to account for time-dependent brittle behavior via an overstress (viscoplastic) formulation. It also includes a thermodynamically consistent formulation of semi-brittle semi-ductile deformation including brittle rock behaviour via damage mechanics and ductile deformation via a rate-dependent viscoplastic formulation. Poro-damage feedback is included via a dynamic porosity to simulate the full volumetric mechanical response of the rock. In LYNX we adopt an implicit and efficient numerical implementation of the material constitutive behaviour within a limited amount of internal iterations and we make use of the concept of Automatic Differentation (AD) techniques to compute the full Jacobian contribution of the system matrix.

Versions

LYNX is available from two repositories:

Citing LYNX

If you use LYNX for your work please cite:

  • Jacquey, A. B., & Cacace, M. (2019). LYNX: Lithosphere dYnamic Numerical toolboX, a MOOSE-based application (1.0). Zenodo. https://doi.org/10.5281/zenodo.3355376
  • Jacquey, A. B., & Cacace, M. (2020a). Multiphysics modeling of a Brittle‐Ductile lithosphere: 1. Explicit Visco‐Elasto‐Plastic formulation and its numerical implementation. Journal of Geophysical Research: Solid Earth, 125(1). https://doi.org/10.1029/2019jb018474
  • Jacquey, A. B., & Cacace, M. (2020b). Multiphysics modeling of a Brittle‐Ductile lithosphere: 2. Semi‐brittle, semi‐ductile deformation and damage rheology. Journal of Geophysical Research: Solid Earth, 125(1). https://doi.org/10.1029/2019jb018475

Participating organisations

Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences

Reference papers

Mentions

Contributors

MC
Mauro Cacace
Project Leader
Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences

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