Geodynamo and mantle convection simulations on the Earth Simulator using the Yin-Yang grid

Details Geodynamo and mantle convection simulations on the Earth Simulator using the Yin-Yang grid Geodynamo and mantle convection simulations on the Earth Simulator using the Yin-Yang grid

2005-06-26

arxiv.org/abs/physics/0506192v1

Journal of Physics: Conference Series, Vol.16, 325-338 (2005)

Physics

Geophysics

Plenary talk at SciDAC 2005

Scientific paper

10.1088/1742-6596/16/1/045

We have developed finite difference codes based on the Yin-Yang grid for the geodynamo simulation and the mantle convection simulation. The Yin-Yang grid is a kind of spherical overset grid that is composed of two identical component grids. The intrinsic simplicity of the mesh configuration of the Yin-Yang grid enables us to develop highly optimized simulation codes on massively parallel supercomputers. The Yin-Yang geodynamo code has achieved 15.2 Tflops with 4096 processors on the Earth Simulator. This represents 46% of the theoretical peak performance. The Yin-Yang mantle code has enabled us to carry out mantle convection simulations in realistic regimes with a Rayleigh number of $10^7$ including strongly temperature-dependent viscosity with spatial contrast up to $10^6$.

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