Journal
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
Volume 171, Issue 1-4, Pages 19-32Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.pepi.2008.06.025
Keywords
Mantle convection; Yin-Yang grid; Pseudo-compressibility; Multigrid method; Local time-stepping
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A new simulation code of mantle convection in a three-dimensional spherical shell is presented. Major innovation of the code comes from an combination of two numerical techniques, namely Yin-Yang grid and ACUTE algorithm, which we had developed for large-scale simulations of solid earth sciences Bench. mark comparisons for the steady convection for low Rayleigh numbers (Ra) with previous calculations revealed that accurate results are successfully reproduced not only for isoviscous cases but also for the cases where the mild temperature-dependence of viscosity is included. We also demonstrated that Our code can reproduce the change in convective flow patterns into the sluggish-lid regime with increasing the viscosity variation r(n) up to 10(4). (C) 2008 Elsevier B.V. All rights reserved.
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