CFD Analysis of Wind Fields Around Regional Airports

JAXA Supercomputer System Annual Report February 2025-January 2026

Report Number: R25EEA10100

Subject Category: Aeronautical Technology

Responsible Representative: Takeshi Fujiwara, Hub Manager, Aviation Technology Directorate, Aviation Safety Innovation Hub
Contact Information: Midori Maki(maki.midori@jaxa.jp)
Members: Yuka Fujita, Midori Maki, Ryota Yamakawa

Abstract

Sudden changes in low-level wind conditions around airports pose a potential risk to aircraft during takeoff and landing. This project aims to improve the situational awareness of pilots and flight dispatchers by predicting and visualizing terrain-induced turbulence in the atmospheric boundary layer based on LES analysis, thereby enhancing safety.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

CFD analysis of several hundred million points is required to resolve terrain-induced turbulence in the atmospheric boundary layer and to study aircraft dynamics. This requires the use of a supercomputer such as JSS3, which boasts large memory capacity and high computational performance.

Achievements of the Year

We analyzed terrain-induced turbulence at Tottori Airport using a solver specialized for wind field analysis over actual terrain. We are currently verifying the validity of these results by comparing them with WRF simulation results, actual observation data, and flight data. Going forward, we aim to elucidate the mechanisms of terrain-induced turbulence that cause aircraft buffeting and apply this knowledge to turbulence prediction.

Publications

- Oral Presentations

Ryota Yamakawa, Yuka Fujita, Yoshinori Shigeta, Hideaki Hata, Midori Maki: Development of a Turbulence Visualization System for Landing Safety and Operational Efficiency Improvement (Investigation of Low-Level Turbulence Generation Mechanism at Tottori Airport), 63rd Aircraft Symposium, 2025.

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: OpenMP
Number of Processes: 1 - 36
Elapsed Time per Case: 144 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.07

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	0.00	0.00
TOKI-ST	600235.43	0.62
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 Resources
File System Name	Storage Assigned (GiB)	Fraction of Usage*2(%)
/home	0.00	0.00
/data and /data2	50000.00	0.33
/ssd	0.00	0.00

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	1.95	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)	0.00	0.00

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