Development of 3D CFD core-software of automotive engine combustion chamber
JAXA Supercomputer System Annual Report April 2020-March 2021
Report Number: R20EDA201N11
Subject Category: Aeronautical Technology
- Responsible Representative: MIZOBUCHI Yasuhiro, Senior researcher, Aeronautical echnology Directrate, Numerical Simulation Research Unit
- Contact Information: MIZOBUCHI Yasuhiro, Japan Aerospace Exploration Agency, Aeronautical Technology Directrate(mizo@chofu.jaxa.jp)
- Members: Taisuke Nambu, Hiroki Yao, Shogo Yasuda, Yasuhiro Mizobuchi, Hiroyuki Abe, Manabu Hisida, Atsusi Fujino, Daichi Obinata, Takuhito Kuwabara, Shintaro Koike, Mikiroh Motoe, Kei Shimura, Toshikuni Koganei
Abstract
Enhancement of CAE utilization in automotive engine research by developing an engine combustion simulation software that is sharable in Japan automotive research community
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
Massive-parallel large scale simulation, Large number of simulations fo software validation
Achievements of the Year
Computational time of mortoring simulation has been reduced to 1/2 by the implementation of dynamic AMR(Adaptive Mesh Refinement) procedure and the enhancement of inner iteration convergency of implicit time integration. The figure shows the AMR patterns depending on the states of the intake and exhaust valves.
Fig.1: AMR patterns depending on the states of the intake and exhaust valves.
Fig.2(video): Motoring simulation by dynamic AMR.
Publications
- Peer-reviewed papers
Yao, H., Nambu, T., Mizobuchi, Y., "An immersed boundary method for practical simulations of high-Reynolds number flows by k-e RANS models," Journal of Fluid Science and Technology Vol. 16 No.1 (2020).
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: OpenMP
- Number of Processes: 1 - 1200
- Elapsed Time per Case: 500 Hour(s)
Resources Used(JSS2)
Fraction of Usage in Total Resources*1(%): 1.03
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 | 4,124,837.23 | 0.78 |
| SORA-PP | 63,324.07 | 0.50 |
| SORA-LM | 5,434.70 | 3.19 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 1,263.60 | 1.16 |
| /data | 464,320.66 | 8.97 |
| /ltmp | 7,835.64 | 0.67 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 48.93 | 1.62 |
*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(%): 1.52
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 | 6,342,111.24 | 1.36 |
| TOKI-RURI | 71,175.48 | 0.41 |
| TOKI-TRURI | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 2,054.11 | 1.41 |
| /data | 489,448.15 | 8.20 |
| /ssd | 2,867.79 | 1.50 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 48.93 | 1.62 |
*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