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Associate Professor, Graduate School of Science, Tohoku University *Profile is at the time of the award.
2024Inamori Research GrantsScience & Engineering
It is often said that "computer simulations are telescopes for theoretical astrophysics." For good simulations, high-performance supercomputers are obviously necessary, but we need both good hardware and software. In this project, we will develop a high-performance "telescope" that anyone can use and contribute to research not only in astronomy but also in other fields.
For astrophysical radiation hydrodynamic simulations, we have implemented a radiation solver based on the flux-limited diffusion approximation and an implicit method in the Athena++ code. We developed a solver that combines the Newton-Raphson method and the Full Multigrid method to solve large-scale nonlinear partial differential equations efficiently. Test calculations have been completed, and we have confirmed that parallel simulations are possible. In parallel, we compare numerical methods for astrophysical magnetohydrodynamic simulations, and also port the code to GPUs.
K. Tomida, et al. (2026) Systematic Comparison between Constrained Transport and Mixed Divergence Cleaning Methods for Astrophysical Magnetohydrodynamic Simulations arXiv 2605.07928
Science & Engineering
