低速流れの非定常計算における人工粘性の影響

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タイトル別名
  • Influences of artificial viscosity terms on unsteady calculation of low-speed flowfield

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説明

When computational simulation for low Mach number flows is conducted with a compressible flow solver, its performance deteriorates in terms of both convergence speed and accuracy. The deterioration of accuracy is caused by excessive artificial viscosity in low Mach flow regions. In order to improve convergence of an iterative method, a local preconditioning method for low speed flow is frequently used. The preconditioning method minimizes the wave speed range between a particle wave and an acoustic wave. When the preconditioning method is applied to an upwind scheme, its artificial viscous terms need to be modified by preconditioning matrix. This modification cures the accuracy problem of calculated flows in the low-Mach flow regions. In this paper, the effects of the preconditioning method on unsteady calculation of flows around an airfoil are discussed.

資料番号: AA0049212026

レポート番号: JAXA-SP-05-017

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詳細情報 詳細情報について

  • CRID
    1050574036210347264
  • NII論文ID
    120006829427
  • NII書誌ID
    AA11984031
  • ISSN
    1349113X
  • Web Site
    http://id.nii.ac.jp/1696/00006153/
  • 本文言語コード
    ja
  • 資料種別
    conference paper
  • データソース種別
    • IRDB
    • CiNii Articles

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