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Modelling lithosphere dynamics with robust rheological implementations: Towards 3D

Abstract : Reliable numerical models of lithospheric deformation require robust solution methods. The latter should account for a complex and realistic rheological model and should also provide convergent and reproducible results. Here we present models of crustal-scale deformation that accurately capture the phenomenon of strain localisation in two-dimensions. The use of viscous regularisation yields convergent numerical results. We will compare linearisation methods (consistent tangent, effective viscosity) and discuss the implementation of rheological models (power-law viscous, hardening/softening laws). We will also present three-dimensional models of crustal-scale strain localisation that benefit from both the above-described methods and the computing power of graphical processing units (GPUs).
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https://hal-insu.archives-ouvertes.fr/insu-02539494
Contributor : Isabelle Dubigeon <>
Submitted on : Friday, April 10, 2020 - 10:34:32 AM
Last modification on : Sunday, April 12, 2020 - 1:11:32 AM

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  • HAL Id : insu-02539494, version 1

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Thibault Duretz, Rene de Borst, Ludovic Räss. Modelling lithosphere dynamics with robust rheological implementations: Towards 3D. European Geosciences Union General Assembly, Apr 2020, online, Austria. pp.EGU2020-13742. ⟨insu-02539494⟩

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