Abstract
The flow field pattern and gas cyclone performance have been investigated using both RANS and LES methodologies. The solid phase has been simulated using the one-way coupling approach. Both the RSM model and LES can be used efficiently to simulate the main features flow field pattern and estimate the performance. However, when looking at the flow details, LES can more accurately capture the unsteady flow phenomena of the highly swirling flow. Two different optimisation techniques have been applied (namely, the Nelder-Mead and the genetic algorithms) to obtain the cyclone geometry for minimum pressure drop. Two sources of data for the objective function have been used, mathematical models and experimental data. Starting from a Stairmand design an improved cyclone geometry is found using seven geometrical design variables. A CFD comparison between the original design and the new design has been performed. The simulations confirm the superior performance of the new design.
Keywords
- Cyclone Separator
- Optimisation
- Reynolds Stress Model
- Large Eddy Simulation
- Discrete Phase Modeling
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References
Derksen, J.J.: Separation performance predictions of a stairmand high-efficiency cyclone. AIChE Journal 49(6), 1359–1371 (2003)
Derksen, J.J., Van den Akker, H.E.A.: Simulation of vortex core precession in a reverse-flow cyclone. AIChE Journal 46(7), 1317–1331 (2000)
Elsayed, K., Lacor, C.: Optimization of the cyclone separator geometry for minimum pressure drop using mathematical models and CFD simulations. Chemical Engineering Science 65(22), 6048–6058 (2010)
Elsayed, K., Lacor, C.: The effect of cyclone inlet dimensions on the flow pattern and performance. Applied Mathematical Modelling 35(4), 1952–1968 (2011)
Elsayed, K., Lacor, C.: Numerical modeling of the flow field and performance in cyclones of different cone-tip diameters. Computers & Fluids 51(1), 48–59 (2011)
Elsayed, K., Lacor, C.: Modeling and pareto optimization of gas cyclone separator performance using RBF type artificial neural networks and genetic algorithms. Powder Technology 217, 84–99 (2012)
Elsayed, K., Lacor, C.: The effect of cyclone vortex finder dimensions on the flow pattern and performance using LES. Computers & Fluids 71, 224–239 (2013)
Hoekstra, A.J.: Gas flow field and collection efficiency of cyclone separators. PhD thesis, Technical University Delft (2000)
Hoekstra, A.J., Derksen, J.J., Van Den Akker, H.E.A.: An experimental and numerical study of turbulent swirling flow in gas cyclones. Chemical Engineering Science 54, 2055–2065 (1999)
Kaya, F., Karagoz, I.: Performance analysis of numerical schemes in highly swirling turbulent flows in cyclones. Current Science 94(10), 1273–1278 (2008)
Launder, B.E., Reece, G.J., Rodi, W.: Progress in the development of a Reynolds-stress turbulence closure. Journal of Fluid Mechanics 68(3), 537–566 (1975)
Nelder, J.A., Mead, R.: A simplex method for function minimization. The Computer Journal 7(4), 308–313 (1965)
Shalaby, H.: On the potential of large eddy simulation to simulate cyclone separators. PhD thesis, Chemnitz University of Technology, Chemnitz, Germany (2007)
Shalaby, H., Pachler, K., Wozniak, K., Wozniak, G.: Comparative study of the continuous phase flow in a cyclone separator using different turbulence models. International Journal for Numerical Methods in Fluids 48(11), 1175–1197 (2005)
Slack, M.D., Prasad, R.O., Bakker, A., Boysan, F.: Advances in cyclone modeling using unstructured grids. Trans. IChemE 78 Part A (2000)
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© 2014 Springer-Verlag Berlin Heidelberg
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Elsayed, K., Lacor, C. (2014). Analysis and Optimisation of Cyclone Separators Geometry Using RANS and LES Methodologies. In: Deville, M., Estivalezes, JL., Gleize, V., Lê, TH., Terracol, M., Vincent, S. (eds) Turbulence and Interactions. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 125. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-43489-5_8
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DOI: https://doi.org/10.1007/978-3-662-43489-5_8
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-43488-8
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