Rotary gas-liquid separator for use under gas-rich conditions
JAXA Supercomputer System Annual Report February 2024-January 2025
Report Number: R24EDG10104
Subject Category: Research and Development
- Responsible Representative: Masato Sakurai, Manager of ECLSS, Research Unit II, Aerospace RInsertHereD Directorate, JAXA
- Contact Information: Masato Sakurai(sakurai.masato@jaxa.jp)
- Members: Masato Sakurai, Ichiro Ueno
Abstract
In this study, we focus on a centrifuge for gas-rich gas-liquid two-phase flow generated by the Sabatier reaction.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
Numerical analysis of centrifuges makes it possible to evaluate various physical properties such as local flow rates that cannot be measured in experimental systems. In these studies, large computational resources are required to reproduce the complex mechanisms of centrifuges, and the use of JSS makes it possible to perform a large number of calculations at high speed.
Achievements of the Year
In order to evaluate the liquid discharge function under microgravity conditions for the development of a centrifuge, simulations were conducted in the absence of gravitational acceleration (Fig.1). Regardless of the direction of rotation, liquid accumulating on the inner wall of the enclosure moves toward the center of the rotating blades while contacting the blades. The liquid then flows back to the inner wall of the enclosure and entrains gas.
Fig.1: Interface behavior inside the enclosure: (a) forward rotation, (b) reverse rotation (The interface is set at a liquid content of 0.5, and the color gradually fades with depth).
Publications
- Poster Presentations
Numerical simulation on a rotating separation of gas-rich gas-liquid two-phase flows in a zero-gravity environment, The 68th Space Science and Technology Conference
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: OpenMP
- Number of Processes: 144 - 720
- Elapsed Time per Case: 96 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.40
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
| System Name | CPU Resources Used(Core x Hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 0.00 | 0.00 |
| TOKI-ST | 3456996.81 | 3.55 |
| TOKI-GP | 0.00 | 0.00 |
| 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 Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 0.00 | 0.00 |
| /data and /data2 | 227765.00 | 1.09 |
| /ssd | 30720.00 | 1.65 |
| 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 Used(Hours) | Fraction of Usage*2(%) | |
|---|---|---|
| ISV Software Licenses(Total) | 10.97 | 0.01 |
*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2024-January 2025