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SGS Stress Transport Equation-based SGS Modeling for Comprehensive LES Model

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JAXA Supercomputer System Annual Report April 2018-March 2019 Report Number: R18ECMP08 Subject Category: Competitive Funding PDF Responsible Representative: Shingo Matsuyama, Aeronautical Technology Directorate, Numerical Simulation Research Unit Contact Information: Shingo Matsuyama(smastu@chofu.jaxa.jp) Members: Shingo Matsuyama Abstract In this study, we aim to realize a comprehensive LES that does not require any tuning for model parameters to the target flow field by solving the SGS stress transport equations. The SGS stress equations are derived exactly from the spatial filtering operation, but requires・・・<<read more>>

Numerical Study on Rotor Performance of Mars Helicopter

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JAXA Supercomputer System Annual Report April 2018-March 2019 Report Number: R18EACA41 Subject Category: JSS2 Inter-University Research PDF Responsible Representative: Makoto Sato, Associate Professor, Kogakuin University Contact Information: Makoto Sato, Kogakuin University(msato@cc.kogakuin.ac.jp) Members: Makoto Sato, Daichi Ogasawara, Yodai Suzuki Abstract Mars helicopter project is now going. Since the atmospheric density on Mars is about 1/100, the sound of speed is about 3/4 compared with those on Earth, we need to develop the high performance heli-rotor. In JAXA, the experimental measurements of・・・<<read more>>

Three-dimensional MHD simulation of the solar wind acceleration

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JAXA Supercomputer System Annual Report April 2018-March 2019 Report Number: R18EACA40 Subject Category: JSS2 Inter-University Research PDF Responsible Representative: Munehito Shoda, PhD candidate, The University of Tokyo Contact Information: Munehito Shoda(shoda.m.astroph@gmail.com) Members: Munehito Shoda, Takaaki Yokoyama Abstract To reveal the pysical mechanism of the heating and acceleration of the solar wind, we have conducted for the first time a three-dimensional MHD simulation of the solar wind. Reference URL N/A Reasons for using JSS2 We need a large amount of calculation・・・<<read more>>

Numerical investigation of combustible flows using the adaptive mesh refinement (AMR)

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JAXA Supercomputer System Annual Report April 2018-March 2019 Report Number: R18EACA35 Subject Category: JSS2 Inter-University Research PDF Responsible Representative: Tang xinmeng, Edyta Dzieminska, A. Koichi Hayashi, Sophia University Contact Information: Tang Xinmeng, Sophia University, simondonxq@gmail.com(simondonxq@gmail.com) Members: Edyta Dzieminska, Hajime Sakai, Yuichi Niga, Syota Yamamoto, Xinmeng Tang, Koichi Hayashi, Koki Kobayashi, Wataru Koido Abstract This study is to numerically simulate combustible flows (especially hydrogen-air) with the adaptive mesh refinement so that the combustible features, flame propagation, deflagration to detonation transition (DDT)・・・<<read more>>

Magnetohydrodynamic modeling of space plasma processes

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JAXA Supercomputer System Annual Report April 2018-March 2019 Report Number: R18EACA28 Subject Category: JSS2 Inter-University Research PDF Responsible Representative: Seiji Zenitani, Researcher, Kyoto University Contact Information: Seiji Zenitani(zenitani@rish.kyoto-u.ac.jp) Members: Seiji Zenitani, Iku Shinohara, Takahiro Miyoshi Abstract This project investigates basic processes in space plasmas, by using supercomputer simulations. In particular, we study "magnetic reconnection" in space, an abrupt change in magnetic topology. In order to support research activities by ourselves and by other groups, we develop massively-parallel simulation codes. They・・・<<read more>>