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Numerical analysis on atomization and spray combustion

JAXA Supercomputer System Annual Report April 2019-March 2020

Report Number: R19EA2150

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Tatsuya Ishii, Propulsion Research Unit, Aeronautical Technology Directorate
  • Contact Information: Kazuaki Matsuura, Japan Aerospace Exploration Agency, Aeronautical Technology Directorate, Propulsion Research Unit(matsuura.kazuaki@jaxa.jp)
  • Members: Kazuaki Matsuura, Naoki Nakamura, Mitsumasa Makida, Huilai Zhang, Jun Iino, Kinya Saito

Abstract

A numerical study is performed to clarify phenomena on atomization and spray combustion.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

The atomization phenomenon requires a high calculation load, and the use of super computer is necessary.

Achievements of the Year

The numerical simulation of a planer prefilming air-blast atomaization was conducted. Due to the poor grid resolution, it was turned out that the breakup phenomenon of the ligaments to droplets could not be captured adequately. Based on these numerical simulation results, next numerical simulation will be conducted with finer grid size.

Annual Reoprt Figures for 2019

Fig.1: Atomization of a planar liquid sheet with air flow.

 

Publications

N/A

Usage of JSS2

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: OpenMP
  • Number of Processes: 96 – 768
  • Elapsed Time per Case: 1000 Hour(s)

Resources Used

 

Fraction of Usage in Total Resources*1(%): 1.15

 

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
SORA-MA 10,423,016.00 1.27
SORA-PP 2,046.18 0.01
SORA-LM 0.00 0.00
SORA-TPP 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 325.29 0.27
/data 26,633.14 0.46
/ltmp 2,752.98 0.23

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.11 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.

JAXA Supercomputer System Annual Report April 2019-March 2020