Numerical Study of Flow and Thermal Field on a Parallel Flow Vortex Tube

Noor, Dedy Zulhidayat; Mirmanto, Heru; Sarsetiyanto, Joko; Soedjono, Denny M. E.; Setyawati, Sri Bangun

doi:10.4236/eng.2012.411099

Cited by 4 publications

(1 citation statement)

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“…For our works, the chosen model of the parallel-flow vortex tube is the same as the previous study [18] and it has a grid independence study with a 500,335 grid numbers. Then we use the same dimensions and number of grids for the counter-flow vortex tube (Figure 1).…”

Section: Numerical Validationmentioning

confidence: 99%

Flow behavior and thermal separation mechanism on vortex tube

Noor

Mirmanto

Sarsetiyanto

et al. 2021

Journal of Thermal Engineering

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Flow behaviour and thermal separation mechanism on vortex tubes have been studied numerically. Rapid expansion indicated by high-pressure gradient near the inlet and the exit ports contributes to energy separation on the parallel and the counter flow vortex tubes. It creates a cooling process at the core region and drives an internal and rotational energy transfer to the peripheral region, then increases the gas temperature at the periphery along with friction due to the presence of the confined wall. Static temperature is related to static pressure in such a way that low pressure leads to the low static temperature at the same region inside the vortex tube. On the other hand, the high total temperature is found in the region with the low dynamic velocity. For both vortex tubes, the flow fields are mainly governed by the tangential velocity at the periphery and by the axial velocity at the core region. The maximum Mach number values based on the maximum tangential velocities in the inlet area for the counter and the parallel flow vortex tubes are 0.689 and 0.726, respectively, so both are compressible and subsonic flows. For the same size of geometry and boundary conditions, the parallel flow vortex tube has higher COP than the counter flow vortex tube i.e. 0.26 and 0.25, respectively.

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Section: Numerical Validationmentioning

confidence: 99%