Application of WENO-Positivity-Preserving Schemes to Highly Under-Expanded Jets

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• 作者：Stefano Zaghi ; Andrea Di Mascio ; Bernardo Favini
• 关键词：Under ; expanded jet transient ; WENO scheme ; Positivity ; preserving scheme ; Riemann’s problem ; CFD
• 刊名：Journal of Scientific Computing
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：69
• 期：3
• 页码：1033-1057
• 全文大小：3,852 KB
• 刊物类别：Mathematics and Statistics
• 刊物主题：Mathematics
  Algorithms
  Computational Mathematics and Numerical Analysis
  Applied Mathematics and Computational Methods of Engineering
  Mathematical and Computational Physics
  
• 出版者：Springer Netherlands
• ISSN：1573-7691
• 卷排序：69

文摘

The starting transient of highly under-expanded supersonic jets is studied by means of very high resolution weighted essentially non oscillatory finite volume schemes, coupled with a positivity-preserving scheme in order to ensure positivity of pressure and density for high compression/expansion ratio. Numerical behaviour of the schemes is investigated in terms of grid resolution, formal accuracy and different approximated Riemann solvers. The transient flow field is also discussed.