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The abrupt variations in thermophysical properties pose significant challenges for the numerical simulation of real-fluid flows. This study evaluates Navier-Stokes characteristic boundary conditions (NSCBC) for non-ideal fluids in conjunction with kinetic-energy-preserving (KEP) and pressure-equilibrium-preserving (PEP) schemes. The characteristic wave relations are applied to the total energy and pressure equations respectively. By demonstrating one-dimensional acoustic wave propagation, the profiles are shown to be significantly more stable for the real-gas regime in the combined KEP with PEP than that solely in KEP.

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An Assessment of Navier-Stokes Characteristic Boundary Conditions for Real Fluids in a Non-Dissipative Numerical Framework

  • 会议论文

  • 发表日期：

    2025年

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  • Zhen Li,
  • Ahmed Abdellatif,
  • Lluís Jofre,
  • Francesco Capuano

摘要

The abrupt variations in thermophysical properties pose significant challenges for the numerical simulation of real-fluid flows. This study evaluates Navier-Stokes characteristic boundary conditions (NSCBC) for non-ideal fluids in conjunction with kinetic-energy-preserving (KEP) and pressure-equilibrium-preserving (PEP) schemes. The characteristic wave relations are applied to the total energy and pressure equations respectively. By demonstrating one-dimensional acoustic wave propagation, the profiles are shown to be significantly more stable for the real-gas regime in the combined KEP with PEP than that solely in KEP.