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Adaptive finite element methods in geodynamics: convection dominated mid-ocean ridge and subduction zone simulations

Davies, David Rhodri, Davies, John Huw, Hassan, O., Morgan, K. and Nithiarasu, P. 2008. Adaptive finite element methods in geodynamics: convection dominated mid-ocean ridge and subduction zone simulations. International Journal of Numerical Methods for Heat & Fluid Flow 18 (7/8) , pp. 1015-1035. 10.1108/09615530810899079

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Abstract

Purpose – The purpose of this paper is to present an adaptive finite element procedure that improves the quality of convection dominated mid-ocean ridge (MOR) and subduction zone (SZ) simulations in geodynamics. Design/methodology/approach – The method adapts the mesh automatically around regions of high-solution gradient, yielding enhanced resolution of the associated flow features. The approach utilizes an automatic, unstructured mesh generator and a finite element flow solver. Mesh adaptation is accomplished through mesh regeneration, employing information provided by an interpolation-based local error indicator, obtained from the computed solution on an existing mesh. Findings – The proposed methodology works remarkably well at improving solution accuracy for both MOR and SZ simulations. Furthermore, the method is computationally highly efficient. Originality/value – To date, successful goal-orientated/error-guided grid adaptation techniques have, to the knowledge, not been utilized within the field of geodynamics. This paper presents the first true geodynamical application of such methods.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Advanced Research Computing @ Cardiff (ARCCA)
Earth and Ocean Sciences
Subjects: Q Science > QE Geology
Uncontrolled Keywords: Finite element analysis, Flow, Meshes, Oceanography, Simulation
Publisher: Emerald
ISSN: 0961-5539
Last Modified: 04 Jun 2017 02:07
URI: http://orca-mwe.cf.ac.uk/id/eprint/9400

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