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Numerical study on unsteady analysis fo compressible flow

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23ETET00

Subject Category: Skills Acquisition System

PDF available here

  • Responsible Representative: Kazuyuki Nakakita, Aviation Technology Directorate, Aircraft Lifecycle Innovation Hub
  • Contact Information: Nobutaka Taniguchi(taniguchi-nobutaka@g.ecc.u-tokyo.ac.jp)
  • Members: Nobutaka Taniguchi

Abstract

Stability analysis is a method to investigate the time-evolution of disturbance field applied to the flow field. In this study, we develop a numerical method suitable for the analysis of compressible flow considering the accurate track of nonlinear time-evolution of the disturbance field. To understand the effect of compressibility on the time-evolution of disturbance field, we apply the developed method to the flow around an airfoil and over a flat plate to investigate the physical property of unsteady compressible flow.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

For the stability analysis considering the time-evolution of disturbance field, sufficient temporal and spatial resolution are needed, indicating that the analysis with JSS3 is needed.

Achievements of the Year

In this year, we validated our results of nonlinear stability analysis by observing flow field applying perturbation field on the flow field. We investigated the flow over NACA0012 airfoil with Re=10^5 and confirmed that the results predicted in the iterative scheme of stability analysis was recovered in the numerical simulation itself.

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: N/A
  • Number of Processes: 4
  • Elapsed Time per Case: 15 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 0.86 0.00
TOKI-GP 789.10 0.01
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 90.00 0.07
/data and /data2 29900.00 0.18
/ssd 0.00 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)
0.00 0.00

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

JAXA Supercomputer System Annual Report February 2023-January 2024