JAXA Supercomputer System Annual Report February 2025-January 2026 Report Number: R25EACA46 Subject Category: JSS Inter-University Research PDF Responsible Representative: Kiori Obuse, Professor, Okayama University Contact Information: Kiori Obuse(obuse@okayama-u.ac.jp) Members: Kiori Obuse, Yuki Yamaguchi Abstract One of the simplest mathematical models describing the dynamics of planetary atmospheres, the 2D barotropic turbulence on a rotating sphere, shows the spontaneous formation of large-scale zonal flows such as those seen in giant gas planets. However, this mechanism has not been fully clarified. The aim・・・<<read more>>
JAXA Supercomputer System Annual Report February 2025-January 2026 Report Number: R25EACA47 Subject Category: JSS Inter-University Research PDF Responsible Representative: Takashi Matsuno, Associate Professor, Tottori University Contact Information: Takashi Matsuno(matsuno@tottori-u.ac.jp) Members: Masahiro Kanazaki, Seiichiro Morizawa, Takashi Matsuno, Taisei Takagi Abstract Plasma actuators (PAs) are flow control devices that generate wall jets on smooth surfaces using discharge plasma and have high potential for aerodynamic applications. The objective of this project is to establish application and optimization methodologies for PAs to realize transition・・・<<read more>>
JAXA Supercomputer System Annual Report February 2025-January 2026 Report Number: R25EACA49 Subject Category: JSS Inter-University Research PDF Responsible Representative: Taku Nonomura, Professor, Nagoya University Contact Information: Taku Nonomura (Professor at Nagoya University)(nonomura@nagoya-u.jp) Members: Taku Nonomura, Takayuki Nagata, Naotaka Shigeta, Yuri Sato, Tentaro Uchida Abstract Large-eddy simulations (LES) are performed under compressible conditions of flow around symmetric airfoils, including flat plates with Reynolds numbers of O(10^3)-O(10^4), to elucidate the effects of compressibility on laminar separation bubbles and turbulent transition. In the・・・<<read more>>
JAXA Supercomputer System Annual Report February 2025-January 2026 Report Number: R25EACA52 Subject Category: JSS Inter-University Research PDF Responsible Representative: Shinichiro Ogawa, Assistant professor, Osaka Metropolitan University Contact Information: Shinichiro Ogawa, Assistant professor, Osaka Metropolitan University(shinichiro.ogawa@omu.ac.jp) Members: Shinichiro Ogawa, Haruyuki Kato, Daisuke Sasaki Abstract In this project, a three-dimensional computational fluid dynamics (CFD) solver based on the Building-Cube Method (BCM) is developed to enable accurate and efficient analysis of complex flow fields within aerospace propulsion systems. Conventional CFD solvers face challenges・・・<<read more>>
JAXA Supercomputer System Annual Report February 2025-January 2026 Report Number: R25EACA55 Subject Category: JSS Inter-University Research PDF Responsible Representative: Takayuki Nagata, Assistant Professor, Nagoya University Contact Information: Takayuki Nagata (Assistant Professor at Nagoya University)(nagata.takayuki.x7@f.mail.nagoya-u.ac.jp) Members: Taku Nonomura, Takayuki Nagata, Shunta Takahashi Abstract This study focuses on compressible multiphase flows and investigates particle-laden flows and flows around small particles through direct numerical simulation of the Navier–Stokes equations. The objective is to acquire fundamental knowledge for understanding high-speed particle-laden flow phenomena, such・・・<<read more>>
