A Comparative Study of Omega RSM and RNG k–Epsilon Model for the Numerical Simulation of a Hydrocyclone

Document Type: Research Article

Authors

State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, CHINA

Abstract

The design and optimization of hydrocyclones using CFD techniques are gaining popularity and the key to a successful simulation lies with the accurate description of the high turbulent swirling behavior of the flow. This paper presents a detailed comparison between the Omega RSM and the RNG k–e turbulence model, which are both derived specially for modeling swirling or rotational flow, in the simulation of a hydrocyclone. The predictions of velocity field, volume of vortexes, mass split and turbulent viscosity were obtained and compared. It is showed that in general both models gave similar predictions of the flow field under different inlet velocities, while the predictions of turbulent viscosity and in the core region of hydrocyclone were found more closely aligned with the reality using Omega RSM.

Keywords

Main Subjects


[1] Chesters A.K., J. Transactions of the Institution of Chemial Engineers, 69: 259-269 (1991).

[2] Bapat P.M., Tavlarides L.L., Smith G.W., J. Chem. Eng. Sci., 38: 2003-2013 (1983)

[3] Bednarski K., Listewnik J., In: "Proceedings of the Third International Conference on Hydrocyclones", Oxford, Uk, pp. 181-192 (1987).

[4] Griffiths W.D., Boysan F., J. Aerosol Sci., 27: 281-304 (1996).

[5] Narasimha M., Brennan M.S., Holtham P.N., J. Minerals Engineering, 20: 414-426 (2007).

[6] Launder B.E., Spalding D.B., J. Computer Methods in Applied Mechanics and Engineering, 3: 269-289 (1974).

[7] Ansys 14.0 Help.

[8] Bhaskar K.U., Murthy Y.R., Raju M.R., J. Minerals Engineering, 20: 60-71 (2007).

[9] Chuah T.G., Gimbun J., Choong T.S.Y., J. Powder Technology, 162: 126-132 (2006).

[10] Delgadillo J.A., Rajamani R.K., J. International journal of mineral processing, 77: 217-230 (2005).

[11] Cullivan J.C., Williams R.A., Cross R., J. Chemical Engineering Research and Design, 81: 455-466 (2003).

[12] Cullivan J.C., Williams R.A., Dyakowski T., J. Minerals Engineering, 17: 651-660 (2004).

[13] Bergström J., Vomhoff H., J. Separation and Purification Technology,53: 8-20 (2007).

[14] Doby M.J., Nowakowski A.F., Yiu I., J. International Journal of Mineral Processing, 86: 18-25 (2008).

[15] Bai Z., Wang H., Tu S.T., J. Minerals Eng., 22: 319-323 (2009).

[16] Fisher M.J., Flack R.D., J. Experiments in Fluids, 32: 302-312 (2002).


Volume 33, Issue 3 - Serial Number 71
September and October 2014
Pages 53-61