JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
Other TitleA Discussion on the Effect of Computational Mesh Oblique to Stream
Author(jpn)相曽, 秀昭
Author(eng)Aiso, Hideaki
Author Affiliation(jpn)宇宙航空研究開発機構航空技術部門数値解析技術研究ユニット(JAXA)
Author Affiliation(eng)Numerical Simulation Research Unit, Aeronautical Technology Directorate, Japan Aerospace Exploration Agency (JAXA)
Issue Date2018-03-09
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構研究開発報告
JAXA Research and Development Report
Start page1
End page12
Publication date2018-03-09
The cartesian grid is widely used in practical CFD computation nowadays. A few of the reasons are the large cost of curvilinear grid that can properly fit the object of computation and fluid phenomena and the advantage of structured grid in computation performance. On the other hand, the disadvantage in quality of computational result is well known. It is inevitable that the numerical result is blunted when the fluid phenomena, i.e. stream and shock surface etc., occur positioned obliquely to the mesh system. While such blunting effect is explained the technical term ‘numerical viscosity’, the machinery of numerical behavior is not yet precisely analysed. We do not have to enough mathematical tools to analyse and it is still impossible to give a clear explanation of the effect. In this article we show trial of analysis to give some explanation to the numerical effect.
Description形態: カラー図版あり
Physical characteristics: Original contains color illustrations
Keywords保存則; 圧縮性Euler方程式; 有限体積法; 数値粘性; 計算格子; Conservation Law; Compressible Euler Equations; Finite Volume Method; Numerical Viscosity; Computational Grid
Document TypeTechnical Report
JAXA Category研究開発報告
NASA Subject CategoryFluid Mechanics and Thermodynamics
Report NoJAXA-RR-17-012

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