Construction of LES model for high-Mach-number multiphase turbulent flows based on DNS
JAXA Supercomputer System Annual Report April 2020-March 2021
Report Number: R20EACA11
Subject Category: JSS Inter-University Research
- Responsible Representative: Kota Fukuda, Assistant Professor, Department of Aeronautics and Astronautics, Tokai University
- Contact Information: Kota Fukuda Tokai University(fukuda@tokai-u.jp)
- Members: Kota Fukuda, Taku Nonomura, Takayuki Nagata
Abstract
Direct Numerical Simulation (DNS) of the flow around a single particle in a compressible low Reynolds number flow is performed to understand the high Mach number solid-gas mixed phase turbulence, and the effect of the presence of particles on the high-speed turbulence phenomenon is clarified.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
In this project, direct numerical simulation (DNS) of high Mach number and low Reynolds number flow around a particle and construction of the data base will be carried out using a boundary-fitted coordinate system. Large scale numerical simulation is essential to construct the data base.
Achievements of the Year
We planned to carry out the analysis this year, but as a result of organizing the results so far, we have not performed the analysis because it is no longer necessary. We organized the calculation data that was done up to last year, wrote a treatise, and prepared the simulation code for the next calculation.
Publications
- Peer-reviewed papers
Nagata, T., Nonomura, T., Takahashi, S., and Fukuda, K., "Investigation on subsonic, transonic and supersonic flow over an isolated sphere up to a Reynolds number of 1000 by direct numerical simulation,"Journal of Fluid Mechanics, Vol. 904, A36 (2020)
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: OpenMP
- Number of Processes: 289
- Elapsed Time per Case: 0.1 Second(s)
Resources Used(JSS2)
Fraction of Usage in Total Resources*1(%): 0.03
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 | 97,250.85 | 0.02 |
| SORA-PP | 0.00 | 0.00 |
| SORA-LM | 0.00 | 0.00 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 39.21 | 0.04 |
| /data | 22,871.24 | 0.44 |
| /ltmp | 2,712.67 | 0.23 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 31.90 | 1.06 |
*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(%): 0.02
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 | 0.00 | 0.00 |
| TOKI-RURI | 0.00 | 0.00 |
| TOKI-TRURI | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 65.70 | 0.05 |
| /data | 32,094.33 | 0.54 |
| /ssd | 137.75 | 0.07 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 31.90 | 1.06 |
*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