Computational visualization of unsteady flow around vehicles using high performance computing

Tsubokura, Makoto; Kobayashi, Toshio; Nakashima, Takuji; Nouzawa, Takahide; Nakamura, Takaki; Zhang, Huilai; Onishi, Keiji; Oshima, Nobuyuki

Computational visualization of unsteady flow around vehicles using high performance computing

Tsubokura, Makoto; Kobayashi, Toshio; Nakashima, Takuji et al.

Computers & Fluids, 2009, 38(5), 981-990

Permalink : https://hdl.handle.net/2115/49859

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アクセス権	open access
URI	https://hdl.handle.net/2115/49859
タイトル	Computational visualization of unsteady flow around vehicles using high performance computing
著者	Tsubokura, Makoto ; Kobayashi, Toshio ; Nakashima, Takuji ; Nouzawa, Takahide ; Nakamura, Takaki ; Zhang, Huilai ; Onishi, Keiji ; Oshima, Nobuyuki
e-Rad_Researcher 40313366 著者名 Tsubokura, Makoto
著者名 Kobayashi, Toshio
著者名 Nakashima, Takuji
著者名 Nouzawa, Takahide
著者名 Nakamura, Takaki
著者名 Zhang, Huilai
著者名 Onishi, Keiji
著者名 Oshima, Nobuyuki
言語	英語
キーワード	Computational Fluid Dynamics (CFD)
	High Performance Computing (HPC)
	Vehicle Aerodynamics
	Turbulent Flow
	Eddy Structures
	Large Eddy Simulation (LES)
発行日	2009-05
出版者	Elsevier
収録物名	Computers & Fluids
巻(号)	38(5)
ページ	981-990
抄録	One of the largest-scale unstructured Large Eddy Simulation (LES) of flow around a full-scale road vehicle is conducted on the Earth Simulator in Japan. The main objective of our study is to look into the validity of LES for the assessment of vehicle aerodynamics, especially in the context of its possibility for unsteady or transient aerodynamic forces. Firstly, the aerodynamic LES proposed is quantitatively validated on the ASMO simplified model by comparing the mean pressure distributions on the vehicle surface with those obtained by a conventional Reynolds-Averaged Navier-Stokes simulation (RANS) or a wind tunnel measurement. Then, the method is applied to the full-scale vehicle with complicated geometry to qualitatively investigate the capability of capturing organized flow structures around the vehicle. Finally, unsteady aerodynamic forces acting on the vehicle in transient yawing-angle change are estimated and relationship between the flow structures and the transient aerodynamic forces is mentioned. As a result, it is demonstrated that LES will be a powerful tool for the vehicle aerodynamic assessment in the foreseeable future, because it can provide precious aerodynamic data which conventional wind tunnel tests or RANS simulations are difficult to provide.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0045-7930
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.compfluid.2008.01.020