A 15.2 TFlops Simulation of Geodynamo on the Earth Simulator

For realistic geodynamo simulations, one must solve the magnetohydrodynamic equations to follow time development of thermal convection motion of electrically conducting fluid in a rotating spherical shell. We have developed a new geodynamo simulation code by combining the finite difference method with the recently proposed spherical overset grid called Yin-Yang grid. We achieved performance of 15.2 Tflops (46% of theoretical peak performance) on 4096 processors of the Earth Simulator.

[1]  W. Henshaw,et al.  Composite overlapping meshes for the solution of partial differential equations , 1990 .

[2]  Akira Kageyama,et al.  Computer simulation of a magnetohydrodynamic dynamo. II , 1994 .

[3]  Akira Kageyama,et al.  Generation mechanism of a dipole field by a magnetohydrodynamic dynamo , 1997 .

[4]  A. Kageyama,et al.  Dipole and octapole field reversals in a rotating spherical shell: Magnetohydrodynamic dynamo simulation , 1999 .

[5]  A. Kageyama,et al.  Flip-Flop Transitions of the Magnetic Intensity and Polarity Reversals in the Magnetohydrodynamic Dynamo , 1999 .

[6]  Akira Kageyama,et al.  Repeated and Sudden Reversals of the Dipole Field Generated by a Spherical Dynamo Action , 2002, Science.

[7]  Yoshiki Seo,et al.  14.9 TFLOPS Three-Dimensional Fluid Simulation for Fusion Science with HPF on the Earth Simulator , 2002, ACM/IEEE SC 2002 Conference (SC'02).

[8]  Masaru Kono,et al.  RECENT GEODYNAMO SIMULATIONS AND OBSERVATIONS OF THE GEOMAGNETIC FIELD , 2002 .

[9]  Hiroshi Takahara,et al.  A 26.58 Tflops Global Atmospheric Simulation with the Spectral Transform Method on the Earth Simulator , 2002, ACM/IEEE SC 2002 Conference (SC'02).

[10]  中島 研吾,et al.  Three-Level Hybrid vs. Flat MPI on the Earth Simulator: Parallel Iterative Solvers for Unstructured Grids on GeoFEM Platform , 2002 .

[11]  Mitsuo Yokokawa,et al.  16.4-Tflops Direct Numerical Simulation of Turbulence by a Fourier Spectral Method on the Earth Simulator , 2002, ACM/IEEE SC 2002 Conference (SC'02).

[12]  Chen Ji,et al.  A 14.6 billion degrees of freedom, 5 teraflops, 2.5 terabyte earthquake simulation on the Earth Simulator , 2003, ACM/IEEE SC 2003 Conference (SC'03).

[13]  Mitsuo Yokokawa,et al.  The Earth Simulator system , 2003 .

[14]  Xindong Peng,et al.  Development of nonhydrostatic coupled ocean-atmosphere simulation code on the Earth Simulator , 2004, Proceedings. Seventh International Conference on High Performance Computing and Grid in Asia Pacific Region, 2004..

[15]  Akira Kageyama,et al.  Application of the Yin-Yang grid to a thermal convection of a Boussinesq fluid with infinite Prandtl number in a three-dimensional spherical shell , 2004 .

[16]  A. Kageyama,et al.  ``Yin-Yang grid'': An overset grid in spherical geometry , 2004, physics/0403123.

[17]  Feng Xiao,et al.  Conservative CIP Transport in Meteorological Models , 2004 .

[18]  Mitsuo Yokokawa,et al.  Hardware system of the Earth Simulator , 2004, Parallel Comput..