CFD Simulation of the Influence of Temperature and Pressure on the Flow Pattern in Cyclones

Shi, Liming; Bayless, David J.; Kremer, A.; Stuart, Ben J.

doi:10.1021/ie051167+

Cited by 22 publications

(9 citation statements)

References 16 publications

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“…Wang et al (2006), Wan et al (2008) and Raoufi et al (2009) have demonstrated the use of CFD in reasonably predicting the tangential velocity under varied conditions. The temperature also has an effect on the tangential velocity (Shi et al, 2006). A minor decrease is noticed at the area of the inner vortex with increasing the temperature.…”

Section: Tangential Velocitymentioning

confidence: 98%

Hydrodynamic Simulation of Cyclone Separators

Utikar¹,

Darmawan²,

Tadé³

et al. 2010

Computational Fluid Dynamics

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Section: Tangential Velocitymentioning

confidence: 98%

Hydrodynamic Simulation of Cyclone Separators

Utikar¹,

Darmawan²,

Tadé³

et al. 2010

Computational Fluid Dynamics

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“…Fluidic systems like vortex tube, [1][2][3] cyclone separators, [4][5][6] swirl tube, 7 hydrocyclones, 8 vortex whistle, swirl combustors, 9 and the vortex diode, [10][11][12] are widely used in various engineering applications. The performance of these devices is largely dominated by the confined turbulent vortex/vortices, due to the tangentially entering fluid.…”

Section: Introductionmentioning

confidence: 99%

CFD simulation of flow in vortex diodes

et al. 2008

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in Wiley InterScience (www.interscience.wiley.com).Vortex diodes are used as leaky nonreturn valves in applications, where it is desirable to avoid valves with moving parts. Despite their use in practice for several decades, no detailed analysis of the flow inside the vortex diodes is available. A strategy was derived for the CFD simulations of the vortical flow in diodes. A good agreement was seen between pressure drop (DP) across the inlet-outlet ports from CFD simulations, and the experimental data for five diode sizes. The simulations showed that in the reverse flow situation tangential velocity was dominant and resulted in conservation of angular momentum in the chamber until it reaches the axial exit port. This vortical motion induced a significant pressure drop (DP r ). The axial velocity gradient over the chamber cross-section helps in inducing relaminarization of the flow. In the forward flow mode, the fluid gets distributed radially over the chamber and exits through the tangential port, yielding low DP f . The analysis showed that the performance of a diode is strongly affected by diode geometry, size, aspect ratio, nozzle configuration and Reynolds number. Among different configurations, the nozzles with entry port size equal to diode yielded higher diodicity. Simulations showed that using angle of divergence for diffuser sections of nozzles of the order of 78 exhibited higher diodicity than smaller angles. It was also observed that at higher flow rates significantly higher diodicity was obtained using axial nozzles with larger radius of curvature for expander section. The modeling methodology and results presented will be useful for evolving better designs of vortex diodes.

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“…The effect of the operating pressure on the flow field in a single cyclone separator is analyzed (Xiong et al, 2005;Shi et al, 2006). The density strongly affects the flow field.…”

Section: Pressure Drop Of Multicyclone Separatormentioning

confidence: 99%

Investigation on the Separation Performance of a Multicyclone Separator for Natural Gas Purification

Xiong

2014

Aerosol Air Qual. Res.

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This study evaluated the separation efficiency and developed a pressure drop model for a multicyclone separator used for natural gas purification. The collection and grade efficiencies of a multicyclone separator with 15 single cyclone separators were evaluated at inlet velocities of 6-24 m/s and particle concentrations of 30-2000 mg/m 3 at atmospheric pressure and room temperature. The experimental results show that although the collection efficiency of a multicyclone separator was 2%-10% less than that of a single cyclone separator at the same operating conditions, most of the particles larger than 10 μm in diameter can be removed by the multicyclone separator. Based on the theoretical pressure drop models of single and multicyclone separators at atmospheric pressure and the pressure drop data measured on site, a pressure drop model was developed that can be used to predict and calculate the pressure drops of multicyclone separators at different pressures and temperatures during natural gas transportation. The modeling results show that 80-90% of the overall pressure drop of a multicyclone separator can be attributed to the single cyclone separators in it. The pressure drop model proposed in this work can accurately predict the pressure drop for different high-pressure multicyclone separators.

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CFD Simulation of the Influence of Temperature and Pressure on the Flow Pattern in Cyclones

Cited by 22 publications

References 16 publications

Hydrodynamic Simulation of Cyclone Separators

Hydrodynamic Simulation of Cyclone Separators

CFD simulation of flow in vortex diodes

Investigation on the Separation Performance of a Multicyclone Separator for Natural Gas Purification

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