System Operation of the Digital/Analog-Hybrid Wind Tunnel (DAHWIN)
JAXA Supercomputer System Annual Report April 2017-March 2018
Report Number: R17EA2405
Subject Category: Aeronautical Technology
- Responsible Representative: Shigeru Kuchi-Ishi, Aeronautical Technology Directorate, Aerodynamics Research Unit
- Contact Information: Shigeru Kuchi-Ishi shigeruk@chofu.jaxa.jp
- Members: Hiroyuki Kato, Shigeru Kuchiishi, Makoto Ueno, Atsushi Hashimoto, Yuichi Matsuo, Kanako Yasue, Suzuki Kohji
Abstract
Through the operation of the JAXA Digital/Analog-Hybrid Wind Tunnel (DAHWIN), we aim to realize the 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 the system users.
Reference URL
Please refer to 'Digital/Analog-Hybrid Wind Tunnel (DAHWIN) | Aerodynamic technology | Aeronautical Technology Directorate'.
Reasons for using JSS2
DAHWIN performs a number of high-fidelity and large-scaled computations (3D RANS analysis) based on the JAXA 2m x 2m transonic wind tunnel testing, and then the use of JSS2 is necessary.
Achievements of the Year
For the CFD analysis using DAHWIN, the system was applied to a total of two JAXA 2m x 2m transonic wind tunnel tests.
Fig.1: CFD results for the AGARD-B model using DAHWIN
Publications
N/A
Usage of JSS2
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 16 - 96
- Elapsed Time per Case: 1.25 hours
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 | 5,099.41 | 0.00 |
| SORA-PP | 28.83 | 0.00 |
| SORA-LM | 56.49 | 0.03 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 649.68 | 0.45 |
| /data | 22,918.60 | 0.42 |
| /ltmp | 7,525.62 | 0.57 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.71 | 0.03 |
*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 2017-March 2018