A consistent characteristic boundary condition for general fluid mixture and its implementation in a preconditioning scheme

Hua Guang Li, Nan Zong, Xi Yun Lu, Vigor Yang

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

Characteristic boundary conditions that are capable of handling general fluid mixtures flow at all flow speeds are developed. The formulation is based on fundamental thermodynamics theories incorporated into an efficient preconditioning scheme in a unified manner. Local one-dimensional inviscid (LODI) relations compatible to the preconditioning system are proposed to obtain information carried by incoming characteristic waves at boundaries accurately. The approach has been validated against a variety of sample problems at a broad range of fluid states and flow speeds. Both acoustic waves and hydrodynamic flow features can pass through the boundaries of computational domain transparently without any unphysical reflection or spurious distortion. The approach can be reliably applied to fluid flows at extensive thermodynamic states and flow speeds in numerical simulations. Moreover, the use of the boundary condition shows to improve the computational efficiency.

原文English
頁(從 - 到)72-92
頁數21
期刊Advances in Applied Mathematics and Mechanics
4
發行號1
DOIs
出版狀態Published - 2012

All Science Journal Classification (ASJC) codes

  • 機械工業
  • 應用數學

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