Deoiling Hydrocyclones Flow Field-A Comparison between k-Epsilon and LES

In this research a comparison between k-epsilon and LES model for a deoiling hydrocyclone is conducted. Flow field of hydrocyclone is obtained by three-dimensional simulations with OpenFOAM code. Potential of prediction for both methods of this complex swirl flow is discussed. Large eddy simulation method results have more similarity to experiment and its results are presented in figures from different hydrocyclone cross sections.

Authors:

• Maysam Saidi
• Reza Maddahian
• Bijan Farhanieh

Keywords:

• Deoiling hydrocyclones
• k-epsilon model
• Largeeddy simulation
• OpenFOAM

References:

[1] A. Belaidi, M. T. Thew, S. J. Munaweera, "Hydrocyclone performance
with complex oil-water emulsions in the feed" in Can. J. Chem. Eng.,
Vol. 81, 2003, pp. 1159-1170.
[2] C. Gomez, J. Caldenty, S. Wang, "Oil/water separation in liquid/liquid
hydrocyclons: part 1experimental investigation", in SPE J., Vol. 7, 2002,
pp. 353-372.
[3] R. G. Devorak, "Separation of light dispersions in long hydrocyclones",
Master of Science Thesis No. 1338609, Michigan State University,
1989.
[4] D. J. Simkin, R. B. Olney, "Phase Separation and Mass Transfer in a
Liquid-Liquid Cyclone", in AIChE, Vol. 2, 1956, pp. 545-551.
[5] Sheng H. P., Welker J. R., Sliepcevich C. M., "Liquid-Liquid Separation
in a Conventional Hydrocyclone", in The Canadian J. of Chem. Eng.,
Vol. 52, 1974, pp.487-491.
[6] D. A. Colman, "The Hydrocyclone for Separating Light Dispersions",
Ph.D. Thesis, Southampton University, UK, 1981.
[7] D. Colman, M. Thew, D. Corney, "hydrocyclones for Oil/Water
Separation". in Int. Conf. on Hydrocyclones, BHRA, Cambridge, United
Kingdom, paper 11, 1980, pp. 143-165.
[8] D. Colman, M. Thew, "Hydrocyclone to Give a Highly Concentrated
Sample of a Lighter Dispersed Phase". In Int. Conf. on Hydrocyclones,
BHRA, Cambridge, United Kingdom, p 15, 1980, pp. 209-223.
[9] D. Colman, M. Thew, "Correlation of Separation Results From Light
Dispersion Hydrocyclones", in Chem. Eng. Res. Des., Vol. 61, 1983, pp.
233-240.
[10] Z. Bai, H. Wang, S. Tu,"Experimental study of flow patterns in deoiling
hydrocyclon", in Mineral Engineering, Vol. 22, 2009, pp. 319-323.
[11] W. P. Jones, B. E. Launder, "The Prediction of Laminarization with a
Two-Equation Model of Turbulence", in International Journal of Heat
and Mass Transfer, Vol. 15, 1972, pp. 301-314.
[12] J. Smagorinsky, "General circulation experiments with the primitive
equations", in Month. Weather, Rev. 91, 1963, pp. 99-165.
[13] J. Deardorff, "A numerical study of three-dimensional turbulent channel
flow at large Reynolds numbers", in Journal of Fluid Mechanics, Vol.
41 (2), 1970, pp. 453-480.
[14] P. Moin, J. Kim, "Numerical investigation of turbulent channel flow", in
J. Fluid Mech. Vol. 118, 1982, pp. 341-377.
[15] W. Jones, M.Wille, "Large eddy simulation of a jet in a cross flow", in:
10th Symposium On Turbulent Shear Flows, The Pennsylvania State
University, 1995, pp. 41-46.
[16] M. Germano, U. Piomelli, P. Moin, W.H. Cabot, "A dynamic subgridscale
eddy viscosity model", in Phys. Fluids, 1991, pp. 31760-31765.
[17] D.K. Lilly, "A proposed modification of the Germano subgrid scale
closure method", in Phys. Fluids A, Vol. 4, 1992, pp. 633-635.