System Operation of the Digital/Analog-Hybrid Wind Tunnel (DAHWIN)
JAXA Supercomputer System Annual Report April 2018-March 2019
Report Number: R18EA2405
Subject Category: Aeronautical Technology
- Responsible Representative: Shigeru Hamamoto, Aeronautical Technology Directorate, Aerodynamics Research Unit
- Contact Information: Shigeru Kuchiishi(kuchi-ishi.shigeru@jaxa.jp)
- Members: Hiroyuki Kato, Shigeru Kuchiishi, Makoto Ueno, Atsushi Hashimoto, Kanako Yasue, Kohji Suzuki
Abstract
Through the operation of the JAXA Digital/Analog-Hybrid Wind Tunnel (DAHWIN), we aim to realize complementary use of Experimental Fluid Dynamics (EFD) and Computational Fluid Dynamics (CFD). Specifically, a series of DAHWIN functions (e.g. CFD before wind tunnel testing, test preparation using pre-CFD data, real time EFD/CFD data monitoring, and EFD/CFD data integration) are served to users.
Reference URL
Please refer to ‘Digital/Analog-Hybrid Wind Tunnel (DAHWIN) | Aerodynamic technology | Aeronautical Technology Directorate‘.
Reasons for using JSS2
DAHWIN requires a number of high-fidelity and large-scaled computations (3D RANS analysis) based on the JAXA 2m x 2m transonic wind tunnel testing, and needs to use the supercomputer.
Achievements of the Year
For the CFD analysis using DAHWIN, the system was applied to a total of 8 JAXA 2m x 2m transonic wind tunnel tests and functions including test preparation using pre-CFD data and real time EFD/CFD data monitoring were utilized.
Fig.1: EFD/CFD real time data monitoring using DAHWIN
Fig.2: Display of pre-CFD result at monitoring
Publications
N/A
Usage of JSS2
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: Automatic Parallelization
- Number of Processes: 512
- Elapsed Time per Case: 30 Minute(s)
Resources Used
Fraction of Usage in Total Resources*1(%): 0.02
Details
Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| SORA-MA | 18,547.99 | 0.00 |
| SORA-PP | 1,469.06 | 0.01 |
| SORA-LM | 24.75 | 0.01 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 647.46 | 0.67 |
| /data | 22,115.53 | 0.39 |
| /ltmp | 7,268.30 | 0.62 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.58 | 0.02 |
*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.
JAXA Supercomputer System Annual Report April 2018-March 2019