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Large Scale N-body simulation of Planet Formation : Effect of Fragmentation of Planetesimals

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Report Number: R16E0061 Responsible Representative: Junko Kominami(okyo Institute of Technology) Contact Information: Masaki Fujimoto(fujimoto.masaki@jaxa.jp) Members: Junko Kominami Subject Category: Space(Space science) Abstract Planets are thought to be formed from dust in protoplanetary disks. However, so far, we have not succeeded to reproduce even our Solar system. I am carrying out N-body simulation in order to clarify how the planetary system was formed. Goal When planetesimals collide with each other, fragments should be formed. Since if such fragments are included in・・・<<read more>>

Feedback Control of Flow Separation Using DBD Plasma Actuator

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Report Number: R16E0060 Responsible Representative: Kengo Asada(Tokyo University of Science) Contact Information: Kengo Asada(asada@rs.tus.ac.jp) Members: Kengo Asada, Takuto Ogawa Subject Category: Aviation(Aircraft,Body sound,Aircraft engine) Abstract The project develops flow control technic by using dielectric barrier discharge (DBD) plasma actuator to establish high efficient and robust vehicle systems such as rockets, aircrafts, and motor vehicles. We propose and demonstrate feedback control methods to adapt unsteady flows over the vehicles through a series of high-fidelity unsteady simulations. Goal The project aims at・・・<<read more>>

Radiative Magnetohydrodynamic Simulations of Solar Atmosphere

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Report Number: R16E0059 Responsible Representative: Haruhisa Iijima(Institute for Space-Earth Environment Research, Nagoya University) Contact Information: Haruhisa Iijima(h.iijima@isee.nagoya-u.ac.jp) Members: Haruhisa Iijima Subject Category: Space(Space science,Space philosophy) Abstract We investigate the validity of the reduction of the Alfven speed in the solar atmospheric model and implement the method to reduce the computational cost of the simulation. We carry out the full sunspot simulation with about 1/100th smaller computational cost. Goal The goal of this project is to contribute the understanding of the・・・<<read more>>

A Study on High-order Accurate Fluid Dynamic Simulations for Rotating Fluid Machinery

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Report Number: R16E0058 Responsible Representative: Hikaru Aono(Tokyo University of Science) Contact Information: Hikaru Aono(aono@rs.tus.ac.jp) Members: Hikaru Aono Subject Category: Space(other ) Abstract This project relates to the development of fluid analysis technology that can be applied to the design of rotating fluid element in turbo pump. In this fiscal year, large-eddy simulation analysis and its verification were carried out for a flow around a small axial flow fan with a low Reynolds number condition and available verification data. From the・・・<<read more>>

Numerical Analysis of Transformation of Shock Waves around a Forward-Facing Cavity

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Report Number: R16E0057 Responsible Representative: Toshiharu Mizukaki(Tokai University) Contact Information: Toshiharu Mizukaki(mizukaki@keyaki.cc.u-tokai.ac.jp) Members: Toshiharu Mizukaki, Taroh Odagiri, Yusuke Higo, Susumu Tanaka, Takayoshi Kubota, Akari Kato, Shouta Natori Subject Category: Basic Research(Numerical analysis) Abstract Around the supersonic parachute for Mars probing, drastic transformation of shock-wave oscillation has been observed. In the worst case, the shock waves oscillation deforms the parachute to collapse. In this research, we try to revile the mechanism of transformation of the shock waves and develop the design・・・<<read more>>