Press Release

Solar mystery about differential rotation was solved with supercomputer “Fugaku”

Solar mystery about differential rotation was solved with supercomputer “Fugaku”
The solar differential rotation was reproduced for the first time with the highest-resolution simulation

he solar internal convection structure reproduced in Fugaku. The entropy, which is suitable to describe the thermal convection is shown. Orange and blue regions correspond to the warm and cool, respectively.

Associate Professor Hideyuki Hotta (Graduate School of Science, Chiba University) and Professor Kanya Kusano (Institute for Space-Earth Environmental Research, Nagoya University) succeeded to precisely reproduce the thermal convection and the magnetic field in the solar interior in the super high-resolution calculation on supercomputer “Fugaku”. As a result, the basic structure of the solar differential rotation, that is, the equator region rotates faster than the polar region, was also reproduced without any artificial manipulation. The calculation ability of “Fugaku” enabled us to reproduce the sun on the computer. We continue carrying out higher-resolution calculations. Our effort will be a big step towards solving the biggest solar mystery, the 11-year solar cycle.

This research was published in Nature Astronomy (13 September 2021).

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Program for Promoting Researches on the Supercomputer Fugaku

BasicScience for Emergence and Functionality in Quantum Matter Simulation for basic science: from fundamental laws of particles to creation of nuclei Human-scale whole brain simulation with connectome analysis and structure-function estimation Development of nuclear fusion plasma confinement physics Large Ensemble Atmospheric and Environmental Prediction for Disaster Prevention and Mitigation Large-scale numerical simulation of earthquake generation, wave propagation and soil amplification Quantum-Theory-Based Multiscale Simulations toward the Development of Next-Generation Energy-Saving Semiconductor Devices Computational and Data Science Study for ET Revolution by Development of Next-Generation Battery and Fuel Cell Digital Twins of Real World's Clean Energy Systems with Integrated Utilization of Super-simulation and AI