Research on Particle Simulation Methods

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22EDA201G19

Subject Category: Aeronautical Technology

Responsible Representative: Takashi Aoyama, Aviation Technology Directorate, Program Director
Contact Information: Kenichi Kubota, Aircraft Lifecycle Innovation Hub, Aviatoin Technology Directorate(kubota.kenichi@jaxa.jp)
Members: Kenichi Kubota, Keita Nakamoto

Abstract

The purpose of this research is to obtain the simulation technology of particle simulation, known to be useful for analysing multi-physics phenomena, to accelerate aircraft development.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

JSS3 was used to conduct the simulaiton of liquid with a particle method, which needs the resource of JSS2 to deal with tens of millions particles in a large computational domain.

Achievements of the Year

Water spray generated from an aircraft tire was simulated using particle simulation method. In this year, the pressure osscilation appeared at the narrow region between the tire and runway was alleviated by improving the wall model. Also, elastic deformation analysis of the tire became possible, and consistency with the experimental data was confirmed. While tire deformation have been determined via testing, it became possible to predict tire deformation just by simulation.

Publications

– Oral Presentations

K. Kubota, S. Koga, Y. Iijima, S. Koike, K. Nakakita: Numerical Simulation and Quasi-Full-Scale Test for Prediction Technology of Water Spray from Aircraft Tire, Proceedings of the 54th Fluid Dynamics Conference/40th Aerospace Numerical Simulation Symposium, 1E04, 2022.

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: OpenMP
Number of Processes: 80 – 256
Elapsed Time per Case: 72 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.48

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	10917325.37	0.48
TOKI-ST	670688.31	0.67
TOKI-GP	0.00	0.00
TOKI-XM	0.00	0.00
TOKI-LM	610.61	0.04
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	138.89	0.13
/data and /data2	5347.56	0.04
/ssd	27.78	0.00

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

*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)	62.49	0.04

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