IIR document

Numerical simulations of a vortex tube working with subcritical carbon dioxide.

Number: 0121



A numerical benchmark of a Ranque-Hilsch vortex tube using subcritical carbon dioxide as the working fluid is performed. Different thermodynamic models and two-equation turbulence models in high or low-Reynolds number formulations are compared to experimental data available in the literature. On the one hand, the results show that the k-ω SST model outperforms both the high and low-Reynolds number formulations of the Standard k-ε model in terms of cold and hot outlet total temperature prediction. On the other hand, real-gas equations of state show greater accuracy even at present subcritical conditions. In this regard, the multiparameter Span-Wagner equation of state yields the best hot outlet total temperature prediction particularly at high operating pressure. Hence, the k-ω SST model in conjunction with the Span-Wagner equation of state are selected to comment internal flow features and investigate the exergy efficiency of the present vortex tube at multiple cold mass fractions.

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Pages: 8 p.


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  • Original title: Numerical simulations of a vortex tube working with subcritical carbon dioxide.
  • Record ID : 30029721
  • Languages: English
  • Subject: Technology
  • Source: 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15th 2022.
  • Publication date: 2022/06/13
  • DOI: http://dx.doi.org/10.18462/iir.gl2022.0121
  • Document available for consultation in the library of the IIR headquarters only.


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