High Resolution Geodynamo Simulation by Yin-Yang Grid and its Visualizations
نویسندگان
چکیده
The highest resolution simulation of geodynamo is performed. The base grid system is the Yin-Yang grid, a spherical overset grid with two congruent components each of which is a part of the usual spherical polar coordinates. High parallelization rate of the Yin-Yang geodynamo code has enabled us to perform the geodynamo simulation with the viscosity one order of magnitude smaller than the previoius calculations. The resulting flow and the generated magnetic field have fairly different structures compared with previous simulations. To analyze the three-dimensional structure of the new dynamo regime, we applied our original visualization tools, Armada and VFIVE. Armada is a software rendering program based on the ray-casting algorithm. Since Armada is parallelized with OpenMP and MPI and does not require any graphics hardware or OpenGL, it runs on general supercomputers. VFIVE is a virtual reality visualization software for CAVE-type virtual reality systems. Owing to the interactive, immersive, and three-dimensional visualization by VFIVE in the CAVE room, we have found an unpexpected structure of the electric current field.
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