Numerical Investigation of three-dimensional flow fields around a cavity
JAXA Supercomputer System Annual Report April 2020-March 2021
Report Number: R20ECWU12
Subject Category: Cooperative Graduate School System
- Responsible Representative: Yuya ohmichi,Aeronautical Technology Directorate,Numerical Simulation Research Unit
- Contact Information: Yuya ohmichi(ohmichi.yuya@jaxa.jp)
- Members: Miumi Maezawa, Yuya Ohmichi
Abstract
It is well known that a rectangular cavity, such as the one found in the landing gear compartment of aircraft, causes self-excited vibration due to turbulent flow and aerodynamic noise. In this study, we investigated the phenomenon of self-excited vibration inside the cavity by using 3D numerical analysis.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
Because it takes time to calculate the unsteady flow field
Achievements of the Year
An analysis of fluid structure in cavity flow at supersonic speed was carried out. Steady-state and unsteady-state fluid simulations were carried out to reproduce the cavity tone phenomenon. The reproducibility of the flow field was investigated.
Publications
N/A
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 256
- Elapsed Time per Case: 50 Hour(s)
Resources Used(JSS2)
Fraction of Usage in Total Resources*1(%): 0.01
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 | 24,139.09 | 0.00 |
| SORA-PP | 2,349.44 | 0.02 |
| SORA-LM | 0.00 | 0.00 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 104.90 | 0.10 |
| /data | 11,718.76 | 0.23 |
| /ltmp | 2,343.75 | 0.20 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 5.66 | 0.19 |
*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(%): 0.06
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 146,912.05 | 0.03 |
| TOKI-RURI | 18,635.39 | 0.11 |
| TOKI-TRURI | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 572.20 | 0.39 |
| /data | 31,250.01 | 0.52 |
| /ssd | 4,901.89 | 2.56 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 5.66 | 0.19 |
*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