Third M.I.T. Conference on Computational Fluid and Solid Mechanics June 14–17, 2005  

Yin-Yang grid and geodynamo simulation

Akira Kageyama*
Earth Simulator Center, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-Machi, Kanazawa-Ku, Yokohama 236-0001, Japan

  Full Text
For geophysical simulations in the spherical geometry, a family of overset grids named Yin-Yang is proposed. The Yin-Yang grid is based on the dissection of a spherical surface into two identical (exactly the same shape and size) subregions. Each subregion of a sphere is patched by the low-latitude part of the usual latitude-longitude grid. The two identical component grids are combined in a complemental way to cover a spherical surface with partial overlap on their borders. High performance of the Yin-Yang grid on a massively parallel computer is demonstrated by an application to geodynamo simulation.

Keywords:  Overset grid; Yin-Yang grid; Spherical geometry; Geodynamo

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