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2673387 
Journal Article 
The effect of cyclone vortex finder dimensions on the flow pattern and performance using LES 
Elsayed, K; Lacor, C 
2013 
Yes 
Computers and Fluids
ISSN: 0045-7930 
71 
224-239 
WOS:000314372400018 
The effect of the vortex finder dimensions (both the diameter and length) on the performance and flow field pattern in nine cyclone separators has been investigated computationally using the large eddy simulation (LES). The vortex finder diameter varies from 0.3 to 0.5 times the cyclone diameter. The vortex finder length varies from 0.5 to unity times the cyclone diameter. Decreasing the vortex finder diameter by 40% results in 175% increase in the dimensionless pressure drop (Euler number) and 50% decrease in the Stokes number. Doubling the vortex finder length increases both the Euler number and the Stokes number by 25%. Decreasing the vortex finder diameter causes a gradual change in the axial velocity profile from the inverted W to the inverted V profile accompanied with 73% increase in the maximum axial velocity. The maximum tangential velocity approaches asymptotically 1.6 times the inlet velocity (25% increase) when decreasing the vortex finder diameter by 40%. (c) 2012 Elsevier Ltd. All rights reserved. 
Cyclone separator; Vortex finder dimensions; Large eddy simulation (LES); Grid convergence index (GCI)