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<p>A numerical study of the flow in a swirl (tangential) vortex chamber using Direct Numerical Simulation (DNS) and Unsteady Reynolds-averaged Navier–Stokes (URANS) approaches is presented. The three-dimensional flow of a viscous incompressible gas (air) is considered at Reynolds number Re = 3.4·10<sup>4</sup>. The distributions of the axial and tangential velocity components, as well as their fluctuations, are analyzed. It is established that the DNS results provide a distribution of parameters in a swirling flow close to the experimental data, whereas turbulence models based on the Boussinesq hypothesis fail to reproduce the dynamics of a confined swirling flow numerically.</p>

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Comparative analysis of flow structure in an axisymmetric vortex chamber using the URANS approach and DNS

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • N. P. Skibina,
  • V. V. Terekhov,
  • V. I. Terekhov

摘要

A numerical study of the flow in a swirl (tangential) vortex chamber using Direct Numerical Simulation (DNS) and Unsteady Reynolds-averaged Navier–Stokes (URANS) approaches is presented. The three-dimensional flow of a viscous incompressible gas (air) is considered at Reynolds number Re = 3.4·104. The distributions of the axial and tangential velocity components, as well as their fluctuations, are analyzed. It is established that the DNS results provide a distribution of parameters in a swirling flow close to the experimental data, whereas turbulence models based on the Boussinesq hypothesis fail to reproduce the dynamics of a confined swirling flow numerically.