Study on dynamic instability of a reentry capsule at transonic speed
JAXA Supercomputer System Annual Report April 2019-March 2020
Report Number: R19ETET12
Subject Category: Skills Acquisition System
- Responsible Representative: Takashi Aoyama, Aeronautical Technology Directorate, Numerical Simulation Research Unit
- Contact Information: Aeronautical Technology Directorate, Numerical Simulation Research Unit(ohmichi.yuya@jaxa.jp)
- Members: Masato Harafuji
Abstract
It is suggested that fluid phenomena of specific frequency may affect the dynamic instability of atmospheric entry capsules. In this study, numerical fluid calculation was carried out for the blunt body shape, and the wake structure was investigated using dynamic mode decomposition.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
Large cost is required to simulate unsteady flow fields.
Achievements of the Year
Unsteady fluid simulation around a blunt body at subsonic speeds and pattern extraction by dynamic mode decomposition were carried out.
Publications
N/A
Usage of JSS2
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 128
- Elapsed Time per Case: 50 Hour(s)
Resources Used
Fraction of Usage in Total Resources*1(%): 0.04
Details
Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.
System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
---|---|---|
SORA-MA | 104,346.82 | 0.01 |
SORA-PP | 24,899.36 | 0.16 |
SORA-LM | 1,428.87 | 0.60 |
SORA-TPP | 0.00 | 0.00 |
File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
---|---|---|
/home | 238.42 | 0.20 |
/data | 42,480.49 | 0.73 |
/ltmp | 976.56 | 0.08 |
Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
---|---|---|
J-SPACE | 17.33 | 0.44 |
*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 2019-March 2020