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  4. Flow Simulation of Gas Cyclone Separator at High Reynolds Number Using theElliptic-Relaxation Hybrid LES/RANS (ER-HRL) Model
 
conference paper

Flow Simulation of Gas Cyclone Separator at High Reynolds Number Using theElliptic-Relaxation Hybrid LES/RANS (ER-HRL) Model

Sayed, Mohamed A.  
•
Dehbi, Abdel
•
Niceno, Bojan
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June 18, 2021
Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer
6th World Congress on Momentum, Heat and Mass Transfer (MHMT'21)

In this paper, we investigate Wall-Modeled Large Eddy Simulation (WMLES) in a stairmand high-efficiency cyclone separator at two Reynolds numbers i.e. Re = 33,045 - 280,000. We compute the gas flow using the elliptic relaxation hybrid RANS/LES (ER-HRL). The model employs a wall integration linear eddy viscosity RANS model for the wall-adjacent region, and switches to the LES dynamic model in the bulk flow. At the lower Reynolds number i.e. Re = 33,045, we investigate the effect of varying cone bottom opening – rendering three different cyclone configurations – on cyclone performance. Flow statistics are reported at several locations across the cyclone axis where both mean and RMS values are observed. For high Reynolds number i.e. Re = 280,000, results are compared against LES and experimental databases from literature. Model predictions of mean flow are in good agreement with reference data, while higher-order moments i.e. RMS values are not very well predicted by the model despite following the same trend of experimental data. Results are in a global good agreement with LES and experimental data at a fraction of well-resolved LES CPU cost. This analysis will serve as a good basis for further investigation of cyclone grade efficiency using Lagrangian particle tracking.

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ICMFHT_110.pdf

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http://purl.org/coar/version/c_970fb48d4fbd8a85

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