Multivariate time series data analysis

JAXA Supercomputer System Annual Report February 2025-January 2026

Report Number: R25EDA201N04

Subject Category: Aeronautical Technology

Responsible Representative: Kazuyuki Nakakita, Aviation Technology Directorate, Fundamental Aeronautics Research Unit
Contact Information: OHMICHI, Yuya(ohmichi.yuya@jaxa.jp)
Members: Ken Fujino, Ryohei Kirihara, Yuya Ohmichi, Hiroki Watanabe

Abstract

With recent advances in computational resources and numerical analysis technologies, the importance of data analysis methods for unsteady fluid phenomena has grown significantly. This research focuses on the development of tools for automatically extracting underlying characteristic structures from large-scale data obtained from unsteady fluid simulations and related sources.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

In order to utilize large-scale memory and high-performance parallel computing capabilities to conduct accurate data analysis and numerical fluid simulations.

Achievements of the Year

We performed large-scale CFD simulations of wake phenomena. In addition, an unsteady coherent structure analysis technique was applied to the resulting data to investigate the mechanisms of characteristic low-frequency phenomena in the wake behind the body.

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: OpenMP
Number of Processes: 1 - 144
Elapsed Time per Case: 24 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.66

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name	CPU Resources Used (Core x Hours)	Fraction of Usage*2(%)
TOKI-SORA	17811557.17	0.81
TOKI-ST	18241.04	0.02
TOKI-GP	0.00	0.00
TOKI-XM	348.44	0.12
TOKI-LM	3803.77	0.29
TOKI-TST	0.00	0.00
TOKI-TGP	0.00	0.00
TOKI-TLM	0.00	0.00

File System Resources
File System Name	Storage Assigned (GiB)	Fraction of Usage*2(%)
/home	0.00	0.00
/data and /data2	15360.00	0.10
/ssd	0.00	0.00

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	3.51	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.

ISV Software Licenses Used

ISV Software Licenses Resources
	ISV Software Licenses Used (Hours)	Fraction of Usage*2(%)
ISV Software Licenses (Total)	56.15	0.04

*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.