System Operation of the Digital/Analog-Hybrid Wind Tunnel (DAHWIN)

JAXA Supercomputer System Annual Report April 2019-March 2020

Report Number: R19EA2405

Subject Category: Aeronautical Technology

Responsible Representative: Shigeru Hamamoto, Aeronautical Technology Directorate, Aerodynamics Research Unit
Contact Information: Mami Hayakawa(hayakawa.mami@jaxa.jp)
Members: Hiroyuki Kato, Shigeru Kuchiishi, Makoto Ueno, Seigo Koga, Atsushi Hashimoto, Yuichi Matsuo, Kanako Yasue, Kohji Suzuki, Mami Hayakawa

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

N/A

Reasons and benefits of using JAXA Supercomputer System

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

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(%): 0.01

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

Computational Resources
System Name	Amount of Core Time (core x hours)	Fraction of Usage*2(%)
SORA-MA	0.00	0.00
SORA-PP	16.43	0.00
SORA-LM	0.00	0.00
SORA-TPP	0.00	0.00

File System Resources
File System Name	Storage Assigned (GiB)	Fraction of Usage*2(%)
/home	766.08	0.64
/data	23,897.37	0.41
/ltmp	7,475.89	0.64

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	0.50	0.01

*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.