National Aerospace Laboratory
National Aerospace Laboratory
出版者
宇宙航空研究開発機構
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構特別資料: 航空宇宙数値シミュレーション技術シンポジウム2003論文集
雑誌名(英)
JAXA Special Publication: Proceedings of Aerospace Numerical Simulation Symposium 2003
巻
JAXA-SP-03-002
ページ
137 - 142
発行年
2004-03-25
抄録（英）
When computational simulation for low Mach number flows is carried out with a compressible flow solver, its performance deteriorates in terms of both convergence speed and accuracy. Difficulties with low speed flow calculation are caused by the disparate particle and acoustic wave speed. Local preconditioning method for the low speed flow minimizes this wave speed range to improve convergence of an iterative method. When calculating unsteady flows, this difficulty also arises. Therefore, preconditioning method is applied to the inner iteration for the unsteady calculation. This paper reports the accuracy of the basic low speed unsteady flows calculation with preconditioning method.
前処理法による非定常低速流れの数値解析の精度
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