JAXA Supercomputer System Annual Report April 2020-March 2021

Report Number: R20EACA45

Subject Category: JSS Inter-University Research

PDF available here

• Responsible Representative: Toshiharu Mizukaki, Professor, Tokai University
• Contact Information: Toshiharu Mizukaki, Dept. of Aeronautics and Astronautics, Tokai University(mzkk@tsc.u-tokai.ac.jp)
• Members: Toshiharu Mizukaki, Hatsuming Wang

Abstract

For fundamental research on the advanced propulsion system using detonation waves, numerical method on detonation prpagation would be established in theis project.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

The propagation speed of detonation waves are more than 2000 m/s. Therefore, the number of the model for culculation for our research easyly reaches several houndreds million, even for a 2-D model. For such kind of numerical analysis, parallel computer with high performance is needed.

Achievements of the Year

In this year, to establish the fundamental numerical procedure for detonation waves anallysis with numerical code CHARIOT, numerical analysis with Etheren/Oxgen premixed gas has been conducted. The results obtained are shown bellow;

- Propagation of detonation waves. (fig. 1)

- The cell structure of the detonation waves. (fig .2)

- Dependance of the detonation propagation analysis with CHARIOT on mesh size. (fig. 3)

- Dependance of the cell analysis with CHARIOT on mesh size. (fig. 4)

Fig.1: Propagation of detonation waves.

Fig.2: The cell structure of the detonation waves.

Fig.3: Dependance of the detonation propagation analysis with CHARIOT on mesh size.

Fig.4: Dependance of the cell analysis with CHARIOT on mesh size

Publications

N/A

Usage of JSS

Computational Information

• Process Parallelization Methods: MPI
• Thread Parallelization Methods: OpenMP
• Number of Processes: 4 - 12
• Elapsed Time per Case: 120 Hour(s)

Resources Used(JSS2)

Fraction of Usage in Total Resources*1(%): 0.22

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

*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.

Resources Used(JSS3)

Fraction of Usage in Total Resources*1(%): 0.01

Details

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

*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.

JAXA Supercomputer System Annual Report April 2020-March 2021