Numerical investigation of gas species and energy separation in the Ranque–Hilsch vortex tube using real gas model

Dutta, T.; Sinhamahapatra, K. P.; Bandyopadhyay, Syamalendu S.

doi:10.1016/j.ijrefrig.2011.06.004

Cited by 59 publications

(20 citation statements)

References 24 publications

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“…The variations of two main parameters namely; the maximum tangential velocity and the cold exit temperature difference are considered for different unit cell volumes as shown in Fig 4. As seen in Fig. 4, applying the numerical models with the average unit cell volumes smaller than 0.0257 mm 3 (which corresponds to 287000 cells) cannot make a big difference in the results. After this average cell volume (0.0257 mm 3 ), the difference between the results is small, and the 287000 cells can present both accuracy and efficiency as well, so it is applied for all the models in this research.…”

Section: Grid Independence Study Boundary Conditions and Validationmentioning

confidence: 97%

“…In this article we utilize the numerical models to explain the details of the separation process inside the air separator. Researches on the vortex tube air separators has a long history, however, we explain a brief list of important works as follow: The NIST real gas model (as a CFD model) was used to investigate the flow pattern inside the air separator by Dutta et al [3]. The capabilities of different turbulence models (the RSM, LES, k-ω, k-ɛ and SST k-ω) for predicting the flow structures within the air separator were examined by Baghdad et al [4] and Rafiee and Sadeghiazad [5].…”

Section: Figure 1 Schematic Diagram Of a Vortex Tube With Flow Direcmentioning

confidence: 99%

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Heat and Mass Transfer Between Cold and Hot Vortex Cores inside Ranque-Hilsch Vortex Tube-Optimization of Hot Tube Length

Rafiee¹,

Mohammadkhani²

2016

IJHT

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This research describes numerical investigations on the impacts of length of main (hot) tube (95 to 125 mm) and type of the boundary condition on the thermal capability (heating and cooling) of the vortex tube and the heat and mass transfer between the cold and hot vortex cores inside a Ranque-Hilsch vortex tube applying the 3D CFD models. The cooling and heating capabilities increase severely with an increase in the main tube length upto 115mm (optimum value) and beyond L=115mm the thermal effectiveness of vortex tube decreases. The results have been compared to the experimental values with good agreement (less than 7 %).

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Section: Grid Independence Study Boundary Conditions and Validationmentioning

confidence: 97%

Section: Figure 1 Schematic Diagram Of a Vortex Tube With Flow Direcmentioning

confidence: 99%

Heat and Mass Transfer Between Cold and Hot Vortex Cores inside Ranque-Hilsch Vortex Tube-Optimization of Hot Tube Length

Rafiee¹,

Mohammadkhani²

2016

IJHT

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“…The Second Law of Thermodynamics limits the steady state operation of an adiabatic vortex tube by imposing the following constraint over the vortex tube: 3 …”

Section: Mathematical Simulationsmentioning

confidence: 99%

“…It can be also found that COP h increases when increasing the evaporating temperature. Input t e , t 3 Figure 5. COP h versus gas-cooler pressure at different nozzle efficiencies.…”

Section: Cycle Performance Analysesmentioning

confidence: 99%

Performance Analysis on CO2 Heat Pump Cycle with a Vortex Tube

Zhao¹,

Ning²

2017

dtmse

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“…Presence of radial separation in a strong centrifugal field was also suggested by the authors. Dutta et al (2011) have used a three dimensional CFD model to investigate energy and species separation in a RHVT with compressed air at normal room temperature and cryogenic temperature. Air was used as the working fluid.…”

Section: Fig 1 Components Of a Rhvt And Its Inlet And Outlet Streammentioning

confidence: 99%

1-D Model for Mass Transfer Calculation in Vortex Tube using Heat and Mass Transfer Analogy

Chatterjee¹,

Mukhopadhyay²,

Vijayan³

2017

AJHMT

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This work introduces a new mathematical model that predicts the mass transfer in a counter current Ranque Hilsch Vortex Tube. The model requires experimental thermal gradient and calculates axial concentration gradient of the heavier species of a binary mixture as mass transfer takes place between two parallel streams moving from inlet towards the hot outlet. The well established Chilton Colburn analogy is used within its applicable range to determine the mass transfer coefficient based on the heat transfer coefficient. The heat transfer coefficient is calculated using Seider-Tate correlation. The model can predict axial concentration gradient of the heavier species in both enriched and depleted stream along the length of the Ranque Hilsch Vortex Tube and mass separation factor. The model is validated with data obtained from experiments conducted with three different vortex generators with variable inlet flow rate. Comparison of the predictions from the model and experimental results shows that the new model can predict the experimental results quite well for a range of flow rate from 0.01 m 3 /s to 0.03 m 3 /s and hot end valve opening values ranging from 1.0 to 4.5 turns. The variation of mass separation factor is also examined with inlet feed flow rate and hot end valve opening values. Air as a binary mixture of nitrogen and oxygen is considered as the working fluid.

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Numerical investigation of gas species and energy separation in the Ranque–Hilsch vortex tube using real gas model

Cited by 59 publications

References 24 publications

Heat and Mass Transfer Between Cold and Hot Vortex Cores inside Ranque-Hilsch Vortex Tube-Optimization of Hot Tube Length

Heat and Mass Transfer Between Cold and Hot Vortex Cores inside Ranque-Hilsch Vortex Tube-Optimization of Hot Tube Length

Performance Analysis on CO2 Heat Pump Cycle with a Vortex Tube

1-D Model for Mass Transfer Calculation in Vortex Tube using Heat and Mass Transfer Analogy

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