Three-dimensional numerical simulation of discharge and flow related to airflow control using plasma actuator
JAXA Supercomputer System Annual Report February 2021-January 2022
Report Number: R21EACA16
Subject Category: JSS Inter-University Research
- Responsible Representative: Naofumi Ohnishi, Professor, Tohoku University
- Contact Information: Naofumi Ohnishi(naohnishi@tohoku.ac.jp)
- Members: Naofumi Ohnishi, Shintaro Sato, Hideto Tamura
Abstract
Plasma actuator has attracted attention as a fluid control device using dielectric barrier discharge. In the experimental study, it has been pointed out that the discharge has a spanwise distribution of the electrode and has a three-dimensional structure. In this study, we perform the three-dimensional numerical calculation of discharge and flow for verification of airflow control effect of plasma actuator.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
In the calculation of the discharge phenomenon, it is necessary to solve Poisson's equation at every time step, and it is solved using a convergence calculation, which calculation cost is high. In addition, since three-dimensional calculations are performed in this research, the required memory capacity is so large, and a supercomputer is necessary.
Achievements of the Year
We conducted a three-dimensional calculation of the discharge process toward the coupled calculation of the discharge and the fluid. Previous research has pointed out that the electrodes of plasma actuators have protrusions of several tens of micrometers. We established a calculation method using general coordinate transformation to reproduce the protrusions of the electrodes, and the calculation was performed using a boundary-fitted mesh that fit the shape of the protrusion. As a result, we got a three-dimensional discharge morphology with the spanwise distribution of the electrodes (Fig.1). We will conduct coupled calculation of discharge and fluid in future work to investigate the effect of the three-dimensional discharge structure on the fluid field.
Fig.1: The obtained three-dimensional discharge structure.
Publications
- Oral Presentations
(1) H. Tamura, S. Sato, N. Ohnishi, Three-dimensional numerical simulation of branching structure in surface dielectric-barrier-discharge, 45th Conference of the institute of electrostatics Japan, Virtual, September 2021. (2) H. Tamura, S. Sato, N. Ohnishi, Three-dimensional numerical simulation of branching structure in surface dielectric-barrier-discharge, 74th Annual Gaseous Electronics Conference,Virtual GEC Platform, October 4-8, 2021.
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: N/A
- Number of Processes: 8 - 720
- Elapsed Time per Case: 60 Hour(s)
JSS3 Resources Used
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 | CPU Resources Used(Core x Hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 0.00 | 0.00 |
| TOKI-ST | 131141.74 | 0.16 |
| TOKI-GP | 0.00 | 0.00 |
| TOKI-XM | 249.30 | 0.18 |
| 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 | 213.33 | 0.21 |
| /data and /data2 | 40960.00 | 0.44 |
| /ssd | 233.33 | 0.06 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 6.94 | 0.05 |
*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) | 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 2021-January 2022