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

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)72-92
Number of pages21
JournalAdvances in Applied Mathematics and Mechanics
Volume4
Issue number1
DOIs
Publication statusPublished - 2012

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Applied Mathematics

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