Technical Report 圧縮性Euler方程式の有限体積法計算における流れと格子の斜交による影響について

相曽, 秀昭  ,  Aiso, Hideaki

JAXA-RR-17-012pp.1 - 12 , 2018-03-09 , 宇宙航空研究開発機構(JAXA) , Japan Aerospace Exploration Agency (JAXA)
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.
形態: カラー図版あり
Physical characteristics: Original contains color illustrations

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