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Thermal analysis of satellites

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23EDG20108

Subject Category: Research and Development

PDF available here

  • Responsible Representative: Seiji Tsutsumi, Research and Development Directorate, Research Unit III
  • Contact Information: tsutsumi.seiji@jaxa.jp(tsutsumi.seiji@jaxa.jp)
  • Members: Masaharu Abe, Seiji Tsutsumi

Abstract

A high-precision, non-equilibrium thermal analysis model is developed for heat accumulators using PCM (Phase Change Material). And, the coupled analysis technology and real-time analysis technology of the thermal fluid region connected to the space vehicle digital twin are acquired.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

In this study, the Enthalpy-Porosity method was employed with ANSYS Fluent whose licenses JSS3 had. In addition, parallel supercomputers of JSS3 was used to obtain the result.

Achievements of the Year

In comparison with the obtained test results, good agreement was obtained with the maximum error of 3.1K (Fig.1)

Annual Reoprt Figures for 2023

Fig.1: Comparison of temperature distribution on the bottom surface of the heat storage device.

 

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: N/A
  • Number of Processes: 8 – 12
  • Elapsed Time per Case: 72 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.03

 

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 31696.91 0.03
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 45.91 0.04
/data and /data2 4000.78 0.02
/ssd 0.00 0.00

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 92.66 0.33

*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)
4485.96 2.02

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

JAXA Supercomputer System Annual Report February 2023-January 2024