Development of a shock-capturing magnetohydrodynamic code, 'OpenMHD'
JAXA Supercomputer System Annual Report April 2016-March 2017
Report Number: R16E0040
- Responsible Representative: Seiji Zenitani(National Astronomical Observatory of Japan, Division of Theoretical Astronomy)
- Contact Information: Seiji Zenitani(zenitani@rish.kyoto-u.ac.jp)
- Members: Tsugunobu Nagai, Seiji Zenitani
- Subject Category: Space(Space science,Space philosophy)
Abstract
We conduct scientifitc researches on basic processes in space plasma environments, by using numerical simulations. We also develop an open-source simulation code.
Goal
To conduct a scientific research on basic processes in space plasmas
Objective
To develop a magnetohydrodynamic (MHD) simulation code for space plasma research
References and Links
Please refer 'OpenMHD code'.
Use of the Supercomputer
We have used the FX supercomputer as a platform to develop our code.
Necessity of the Supercomputer
Space plasma processes are basically described by magnetohydrodynamics (MHD). However, the MHD equation system is highly nonlinear and complex. Supercomputers are necessary to explore space plasma processes.
Achievements of the Year
We havesubtantially improved the performance of our code, as shown in Figure 1. We have also provided visualization routines and documents in our website. As a result of our activity, a scientific paper by third-party authors was published in 2016 (S. Nitta et al. [2016] ApJ).
Fig.1:Benchmarks of the OpenMHD code
Publications
Others
1) Zenitani, S., 2016, Astrophysics Source Code Library, record ascl:1604.001
2) http://th.nao.ac.jp/MEMBER/zenitani/openmhd-e.html
Computational Information
- Parallelization Methods: Process Parallelization,Hybrid Parallelization
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: OpenMP
- Number of Processes: 32
- Number of Threads per Process: 1
- Number of Nodes Used: 32
- Elapsed Time per Case (Hours): 0.3
- Number of Cases: 100
Resources Used
Total Amount of Virtual Cost(Yen): 107,284
Breakdown List by Resources
| System Name | Amount of Core Time(core x hours) | Virtual Cost(Yen) |
|---|---|---|
| SORA-MA | 49,219.98 | 78,164 |
| SORA-PP | 0.00 | 0 |
| SORA-LM | 0.00 | 0 |
| SORA-TPP | 0.00 | 0 |
| File System Name | Storage assigned(GiB) | Virtual Cost(Yen) |
|---|---|---|
| /home | 14.31 | 134 |
| /data | 143.05 | 1,349 |
| /ltmp | 2,929.69 | 27,635 |
| Archiving System Name | Storage used(TiB) | Virtual Cost(Yen) |
|---|---|---|
| J-SPACE | 0.00 | 0 |
Note: Virtual Cost=amount of cost, using the unit price list of JAXA Facility Utilization program(2016)
JAXA Supercomputer System Annual Report April 2016-March 2017