Modeling and Analyzing Hydrocyclone Performances

Document Type: Research Article


1 Department of Chemical Engineering, Islamic Azad University, Mahshahr Branch, Mahshahr, I.R. IRAN

2 Department of Mechanical Engineering, Petroleum University of Technology (PUT), Ahvaz, I.R. IRAN

3 Department of Chemical Engineering, Isfahan University of Technology, Isfahan, I.R. IRAN

4 Iran Research Institute of Petroleum Industry (RIPI), Tehran, I.R. IRAN


Hydrocyclones have been used as an operational tool to separate liquids from solids in different industries for more than 50 years. Considering the importance of this issue, many experimental and numerical attempts have been made to estimate the performance of this tool regarding the resulting pressure drop and the separation efficiency (particles separation limit diameter). Most of the numerical studies for simulating the fluid flow pattern inside Hydrocyclones have been conducted using the ‘’Fluent’’ commercial software. The other alternative for this evaluation is the application of CFD
in COMSOL Multiphysics. This work is mainly focused on studying the effect of entering tangent velocity and also determining the flow pattern by CFD simulation in the powerful COMSOL Multiphysics software. Thereafter, correlations proposed by a number of authors are compared with experimental data to evaluate their performances. Among them, the correlations suggested by Barth and Koch-Lich showed acceptable accordance with reference data and thus were chosen for sensitivity analysis. Based on the results, three geometrical parameters of the hydrocyclone body have considerable effects on the separation efficiency. The findings revealed that decreasing the outlet diameter and the inlet width result in increasing the efficiency of hydrocyclone while enlarging the body diameter has negative effects on it. Furthermore, the cyclone efficiency is enhanced as the density difference between fluid and solid and the input velocity becomes larger.


Main Subjects

[1] Akhbarifar, S., et al., Improving Cyclone Efficiency by Recycle and Jet Impingement Streams, Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 30(2): 119-124 (2011).

[2] Irannajad, M., Rashidi S., Farzanegan A., Computer Simulation of Particle Size Classification in Air Separators, Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 28(4): 71-78 (2009).

[4] Smith V.C., “Particle Size Estimation of Hydrocyclone Overflow”, University of Cape Town (2000).

[5] Tongsir, S., “The Simulation of Hydrocyclone Network for Separating Yeast and Calcium in Ethanol Production, in Chemical and Process Engineering”, King Mongkut’s University of Technology North Bangkok (2007).

[6] Pericleous K., Rhodes N., The Hydrocyclone Classifier—a Numerical Approach, International Journal of Mineral Processing, 17(1): 23-43 (1986).

[7] Hsieh K., Rajamani R.K., Mathematical Model of the Hydrocyclone Based on Physics of Fluid Flow, AIChE Journal, 37(5): 735-746 (1991).

[8] He P., Salcudean M., Gartshore I., A Numerical Simulation of Hydrocyclones, Chemical Engineering Research and Design, 77(5): 429-441 (1999).

[9] Delgadillo J.A., Rajamani R.K., A Comparative Study of Three Turbulence-Closure Models for the Hydrocyclone Problem, International Journal of Mineral Processing, 77(4): 217-230 (2005).

[10] Narasimha M., Brennan M., Holtham P., Numerical Simulation of Magnetite Segregation in a Dense Medium Cyclone, Minerals Engineering, 19(10): 1034-1047 2006.

[11] Brennan, M., CFD Simulations of Hydrocyclones with an Air Core: Comparison Between Large Eddy Simulations and a Second Moment Closure, Chemical Engineering Research and Design, 84(6): 495-505 (2006).

[12] Slack M., et al., Advances in Cyclone Modelling Using Unstructured Grids, Chemical Engineering Research and Design, 78(8): 1098-1104 (2000).

[13] Ko J., et al., Numerical Modelling of Highs Swirl Flows in a Cylindrical Through-Flow Hydrocyclone, Numerical Modelling of Highly Swirling Flows in a Cylindrical Through-Flow Hydrocyclone, (2005).

[14] Xu P., et al., Innovative Hydrocyclone Inlet Designs to Reduce Erosion-Induced Wear in Mineral Dewatering Processes, Drying Technology, 27(2): 201-211 (2009).

[15] Bird R.B., Transport Phenomena, Applied Mechanics Reviews, 55(1): R1-R4 (2002).

[16] Nowakowski A., et al., The Hydrodynamics of a Hydrocyclone Based on a Three-Dimensional Multi-Continuum Model, Chemical Engineering Journal, 80(1): 275-282 (2000).

[17] Suasnabar, D.J., “Dense Medium Cyclone Performance Enhancement via Computational Modelling of the Physical Processes”, University of New South Wales (2000).

[18] Brennan, M.S., Narasimha M., Holtham P.N., Multiphase Modelling of Hydrocyclones–Prediction of Cut-Size, Minerals Engineering, 20(4): 395-406 (2007).

[19] Hsieh K.T., Rajamani K., Phenomenological Model of the Hydrocyclone : Model Development and Verification for Single-Phase Flow, International Journal of Mineral Processing, 22: 223-237 (1988).

[20] Wang B., Yu A., Numerical Study of Particle–Fluid Flow in Hydrocyclones with Different Body Dimensions. Minerals Engineering, 19(10): 1022-1033 (2006).

[21] Ghadirian M., et al., On the Simulation of Hydrocyclones Using CFD, The Canadian Journal of Chemical Engineering, 91(5): 950-958 (2013).

[22] Hsu C.-Y., Wu S.-J., Wu R.-M., Particles Separation and Tracks in a Tydrocyclone, 淡江理工學刊, 14(1): 65-70 (2011).

[23] Holdich R.G., “Fundamentals of Particle Technology”, Midland Information Technology and Publishing (2002).

[24] Barth W., Brennstoff-Warme-Kraft, 8. (1956).

[25] Yang W.C., “Handbook of Fluidization and Fluid-Particle Systems”, Taylor & Francis (2003).

[26] Zenz F.A., Cyclone-Design Tips, Chemical Engineering,. 108(1): 60-      (2001).

[27] Plitt L., A Mathematical Model of the Hydrocyclone Classifier, CIM Bulletin, 69(776): 114-123 (1976).

[28] Hsieh K.-T., Rajamani K., Phenomenological Model of the Hydrocyclone: Model Development and Verification for Single-Phase Flow, International Journal of Mineral Processing, 22(1): 223-237 (1988).

[29] Ipate G., Căsăndroiu T., Numerical Study of Liquid-Solid Separation Process Inside the Hydrocyclones whit Double Cone Sections, Scientific Bulletin of UPB, 69: 19-28 (2007).

[30] Bhaskar,K.U., et al., CFD Simulation and Experimental Validation Studies on Hydrocyclone, Minerals Engineering, 20(1): 60-71 (2007).

[31] GAO S.-l., et al., CFD Numerical Simulation of Flow Velocity Characteristics of Hydrocyclone, Transactions of Nonferrous Metals Society of China, 21(12): 2783-2789 (2011).

[32] Hoffmann P.D.A.C., Hoffmann A.C., Stein L.E., “Gas Cyclones and Swirl Tubes”, Springer (2002).

[33] Iozia, D.L., Leith D., Effect of Cyclone Dimensions on Gas Flow Pattern and Collection Efficiency, Aerosol Science and Technology, 10(3): 491-500 (1989).

[34] KOCH W.H., LICHT W., New Design Approach Boosts Cyclone Efficiency, Chemical Engineering, 84(24): 80-88 (1977).

[35] Dietz, P., Collection Efficiency of Cyclone Separators, AIChE Journal, 27(6): 888-892 (1981).

[36] Hoffmann A.C., Stein L.E., Cyclone Separation Efficiency, Gas Cyclones and Swirl Tubes: Principles, Design and Operation, 89-109 (2008).

[37] Rietema, K., HetMechanisme van de Afscheiding van Fijnverdeelde Stoffen in Cyclonen, De Ingenieur, 71: 39-      (1959).

[38] Avci A., Karagoz I., Effects of Flow and Geometrical Parameters on the Collection Efficiency in Cyclone Separators,Journal of Aerosol Science, 34(7): 937-955 (2003).

[39] Coker, A., Understand Cyclone Design, Chemical Engineering Progress, 89(12):  -  (1993).