Numerical Study of Breakdown and Shock Wave Structures for Improvement of Flight Performance in a Beamed-energy Vehicle
JAXA Supercomputer System Annual Report February 2021-January 2022
Report Number: R21EACA17
Subject Category: JSS Inter-University Research
- Responsible Representative: Masayuki Takahashi, Associate Professor, Tohoku University
- Contact Information: Masayuki Takahashi, Tohoku University(mtakahashi@rhd.mech.tohoku.ac.jp)
- Members: Soichiro Suzuki, Hoshiki Sato, Naoki Tsunezawa, Masayuki Takahashi
Abstract
Objective of this study is revealing a discharge process on beaming propulsion system and finding a condition in which a thrust performance is maximized through numerical simulaiton.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
It is necessary to use JAXA super computer because a beam-induced discharge is induced by an interaction of multi-scale processes and a computational cost becomes huge.
Achievements of the Year
By constructing a plasma model with the electromagnetic wave propagation, plasma drift diffusion, neutral particle transport, detailed chemical reaction, radiation transfer modules, it is found that thermal and associative ionizations are important on a propagation of beam-induced plasma. This is the first achievement result in the world. A multi-dimensional simulation indicates that a speeding-up of the plasma-front propagation is obtained because the electric field at the plasma front is enhanced by multi-dimensional interference of the incident beam and an electron-impact ioniztion frequency is increased.
Publications
N/A
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 1 - 128
- Elapsed Time per Case: 20 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.01
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
| System Name | CPU Resources Used(Core x Hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 245803.92 | 0.01 |
| TOKI-ST | 12.55 | 0.00 |
| TOKI-GP | 0.00 | 0.00 |
| TOKI-XM | 0.00 | 0.00 |
| TOKI-LM | 0.00 | 0.00 |
| TOKI-TST | 0.00 | 0.00 |
| TOKI-TGP | 0.00 | 0.00 |
| TOKI-TLM | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 530.00 | 0.53 |
| /data and /data2 | 10540.00 | 0.11 |
| /ssd | 400.00 | 0.10 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.00 | 0.00 |
*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).
*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.
ISV Software Licenses Used
| ISV Software Licenses Used(Hours) | Fraction of Usage*2(%) | |
|---|---|---|
| ISV Software Licenses(Total) | 0.00 | 0.00 |
*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2021-January 2022