Development of 3D CFD core-software of automotive engine combustion chamber

JAXA Supercomputer System Annual Report April 2019-March 2020

Report Number: R19EDA201N11

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: NAMBU Taisuke, YAO Hiroki, YASUDA Shogo, MATSUO Yuichi, MIZOBUCHI Yasuhiro, ABE Hiroyuki, HISHIDA Manabu, FUJINO Atsushi, OBINATA Daichi, KUWABARA Takuhito, KURAMOTO Takeshi, KAMINAGA Takashi, TOKUNAGA Kenichi, KOYAMA Kentaro, OHI Noriyukii, AONO Junya, KOIKE Shintaro, KASAI Yoshihiroi, ITOU Takafumi, MOTOE Mikiroh, SHIMURA Kei, TAKEDA Hisato, OKABE Takeshi

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(Fig.1) has been reduced to 1/3 by the improvement of BAMR(Block-based Adaptive Mesh Refinement) procedure, the acceleration of gas property calculation and the enhancement of inner iteration convergency of implicit time integration. Figure 2 shows the flame structure in combusiton simulation with BAMR.

Fig.1: Mortoring simulation with BAMR(Vortex structure).

Fig.2: Firing simulation with BAMR(Flame structure).

Publications

– Invited Presentations

Functional design and platform: “Introduction and recent methodological progress,” 2019 JSAE Annual Congress(Spring).

Yasuhiro Mizobuchi, Taisuke Nambu, Hiroki Yao, “Platform of Combustion Simulation Software HINOCA,” ICFD2019.

– Oral Presentations

Hiroki Yao, Taisuke Nambu, Yasuhiro Mizobuchi, “Improvement for the immersed boundary method toward accurate internal flow simulations,” ANSS2019.

Hiroki Yao, Taisuke Nambu, Yasuhiro Mizobuchi, “Improvements of the Immersed Boundary Method for High Reynolds Number Flow with Complex Geometries and its Application to Internal Flow Simulations,” 33rd CFD Symposium.

Usage of JSS2

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: OpenMP
Number of Processes: 1 – 256
Elapsed Time per Case: 100 Hour(s)

Resources Used

Fraction of Usage in Total Resources*1(%): 1.31

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	10,061,932.97	1.22
SORA-PP	85,300.30	0.55
SORA-LM	2,774.84	1.16
SORA-TPP	0.00	0.00

File System Resources
File System Name	Storage Assigned (GiB)	Fraction of Usage*2(%)
/home	4,679.09	3.90
/data	496,445.70	8.50
/ltmp	32,704.40	2.78

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	69.88	1.76

*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.