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Satellite thermal simulation

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22EDG20108

Subject Category: Research and Development

PDF available here

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

Abstract

High fidelity non-equillibrium themal model of a heat storage device with phase change material is studied.

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

Numerical anlaysis to the experiment conducted by JAXA was performed. In this experiment, the heat storage device was made by a 3D printer using Al-Si10-Mg as a material, and octadecane was used for the phase change material (PCM). It was heated for 18 minutes with an average heat input of 76.6W. CFD was conducted using the Enthalpy-Porosity method and ANSYS fluent was used for the solver. Reasonable agreement with experimetal result was obtained. However, since the prsent model assumed that the phase change proceeds linearly, the temperature change with melting was not accurately simulated. We plan to improve the accuracy of the phase change model by using a user defined function of Fluent.

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: N/A
  • Number of Processes: 8
  • Elapsed Time per Case: 71.2 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.00

 

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 1492.20 0.00
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 47.08 0.04
/data and /data2 4012.47 0.03
/ssd 11.69 0.00

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 93.85 0.42

*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)
84.50 0.06

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

JAXA Supercomputer System Annual Report February 2022-January 2023