JAXA Supercomputer System Annual Report (April 2018-March 2019)

Development of 3D CFD core-software of automotive engine combustion chamber
Report Number: R18EDA201N11
Subject Category: Aeronautical Technology
URL: https://www.jss.jaxa.jp/en/ar/e2018/9132/
Responsible Representative
Yasuhiro Mizobuchi, Senior researcher, Aeronautical echnology Directrate, Numerical Simulation ResearchUnit
Contact Information
Yasuhiro Mizobuchi, Japan Aerospace Exploration Agency, Aeronautical Technology Directrate(mizo@chofu.jaxa.jp)
Members
Taisuke Nambu, Hiroki Yao, Shogo Yasuda, Yasuhiro Mizobuchi, Hiroyuki Abe, Manabu Hisida, Tsukasa Hori,Youichi Ogata, Yoshimitsu Kohashi, Atsusi Fujino, Shun Ito, Daichi Obinata, Jun Hashimoto, Ryohei Kirihara,Takuhito Kuwabara, Yasushi Noguchi, Kazuhiro Uehara, Taisuke Kayashima, Hiroyuki Sakai, Shinji Nakamura,
Takahiro Ishida, Takeshi Kuramoto, Takashi Kaminaga, Daiki Miyai, Ryuichi Kaminaga, Masato Kuchita, KenichiTokunaga, Fumihiko Tanoue, Masayuki Suzuki, Kentaro Koyama, Noriyuki Ohi, Hisato Takeda, Taketo Yamada,Junya Aono, Yuhi Morii, Yoshinori Iwanaga, Shintaro Koike, Yoshihiro Kasai, Takafumi Itou, Mikiroh Motoe
Abstract
Enhancement of CAE utilization in automotive engine research by developing an engine combustion simulation
software that is sharable in Japan automotive research community
Ref. URL: https://www.jst.go.jp/sip/event/k01_hinoca/index.html
Reasons for using JSS2
Massive-parallel large scale simulation, Large number of simulations fo software validation
Achievements of the Year
Conservation level has been largely improved by developing a novel IB (Immersed Boundary) method.
Engine combustion simulation software HINOCA which enables combustion simulation directly from engine
data without mesh generation, has been constructed by installing sub-models developed in the SIP combustion
technology project.
The cylinder pressure histories and their cycle to cycle variations in a mass-production engine have been well
reproduced for both stoichometry and lean conditions.

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JAXA Special Publication JAXA-SP-19-003E

Fig. 1: Combustion simulation directly from engine data without meshing process.

Fig. 2: Reproduction of pressure history (left) and cycle to cycle variation (right) of a massproduction engine for stoichiometric (upper) and lean (lower) conditions.

Publications- Non peer-reviewed papers
Yasuhiro Mizobuchi, Automotive Engine Combustion Simulation Software “HINOCA”, Journal of Society ofAutomotive Engineers of Japan, Vol. 72 No. 4 (2018).

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JAXA Supercomputer System Annual Report (April 2018-March 2019)- Oral Presentations
Takashi Kaminaga, Akira Kikusato, Beini Zhou, Yuuhi Morii, Taketo Yamada, Toru Takabayashi, Jin Kusaka,Shogo Yasuda, Hiroki Yao, Manabu Hishida, Taisuke Nambu, Yasuhiro Mizobuchi and Yuichi Matsuo, Large
Eddy Simulation and Analysis of Cycle-by-Cycle Variations in a Spark Ignition Gasoline Engine, 2018 JSAEAnnual Congress (Spring), May 2018.
Satoshi Kawauchi and Masahide Takagi, Study on Applicability of Breakup Model to Sprays of Gasoline andDiesel Engines, 2018 JSAE Annual Congress (Spring), May 2018.
Satoshi Kawauchi, Masahide Takagi, Satoshi Ideguchi, Beini Zhou and Jin Kusaka, Effect of Atomization
Characteristics on Mixture Formation Process in Gasoline Spray Simulation, 2018 JSAE Annual Congress(Autumun), October 2018.
Tsukasa Hori, Modeling of the evolution from ignition kernel to planar flame, 56th Symposium (Japanese) onCombustion, November, 2018.
Tsukasa Hori, Development of spark ignition model for super lean-burn in SI engines, 29th Internal Combustion
Engine Symposium, November, 2018.
Taisuke Nambu, Yasuhiro Mizobuchi, Takuhito Kuwabara, Ryohei Kirihara, Applying high-order compact
scheme and block-based AMR to Compressible LES flow solver for IC engine, LES4ICE2018, IFPEN/RueilMalmaison, France, December, 2018.
Usage of JSS2

Computational Information
Process Parallelization Methods

MPIThread Parallelization Methods

OpenMP

Number of Processes

1 - 500

Elapsed Time per Case

500 Hour (s)Resources Used
Fraction of Usage in Total Resources*1 (%): 8.07
Details
Computational Resources
System Name

Amount of Core Time(core x hours)

Fraction of Usage*2 (%)

SORA-MA

70,455,231.76

8.63

SORA-PP

355,971.30

2.84

SORA-LM

12.78

0.01

SORA-TPP

0.00

0.00

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JAXA Special Publication JAXA-SP-19-003E

File System Resources
File System Name

Storage Assigned (GiB)

Fraction of Usage*2 (%)/home

2,139.83

2.21/data503,079.69

8.88/ltmp

47,564.70

4.07

Archiver Resources
Archiver Name

Storage Used (TiB)

J-SPACE

Fraction of Usage*2 (%)
50.08

1.75

*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.

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