LYNX (Lithosphere dYnamic Numerical toolboX) is a numerical simulator for modelling the multiphysics of deformation of the lithosphere including a variety of rheological models such as brittle, ductile or damage rheologies.

LYNX makes use of the flexible, object-oriented numerical framework (MOOSE developed at the Idaho National Laboratory), which provides a high-level interface to some of the most sophisticated nonlinear solver technology on the planet. MOOSE presents a straightforward API that aligns well with the real-world problems scientists and engineers need to tackle. LYNX solves governing equations for deformation, fluid flow and thermal state of the lithospheric rocks in a weak sense (by classical Newton–Raphson or by free Jacobian inexact Newton-Krylow schemes) on an underlying unstructured mesh.

Different rheologies are included in the LYNX simulator:

  • Pressure-sensitive yielding material based on a (visco)-elastoplastic Drucker-Prager model
  • Diffusion, dislocation and Peierls creep models
  • Damage rheology for capturing microscopic processes such as grain crushing

LYNX is open sourced under the GNU GENERAL PUBLIC LICENSE v3 and can be obtained upon request by contacting one of the authors.

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