Hydrodynamics Investigation of the Gas Centrifuge

Document Type : Research Article


1 Chemical Engineering Department, Iran University of Science and Technology, Tehran, I.R. IRAN

2 Process Development and Equipment Technology Division, Research Institute of Petroleum Industry (RIPI), Tehran, I.R. IRAN


Regard to the extensive applications of gas centrifuges to remove gas pollutants, detailed knowledge of the flow behavior inside a gas centrifuge is important and necessary to properly design and optimization of its operation. In this research, gas centrifuge hydrodynamic and heat transfer phenomena have been simulated in unsteady state condition, three dimensional and supposing gas phase as compressible flow using CFD technique. According to high speed rotation of gas centrifuge outer wall, Multiple Rotating Reference Frame (MRF) approach applying k-ε RNG and RSM turbulence model was implemented in computational model. Computational model results include pressure, velocity, temperature profile as well as fluid flow pattern in the gas centrifuge. Comparing the CFD simulation results applying the RNG k-ε and RSM turbulence models, indicate that there are little difference between the velocity and radial pressure of the fluid. Hence, considering the high computational cost of the RSM model, the RNG k-ε turbulence model seems efficient in determining the turbulent fluid characteristics in gas centrifuges. The CFD simulation results approved that fluid swirl in gas centrifuge, feed inlet as well as upper and bottom scoops, extremely affects fluid flow pattern and axial gas velocity.


Main Subjects

[1] Golombok M., Bill K., Removal of CO2 from a Gas Stream Using An Experimental Centrifugr, Ind. Eng. chem, 44, p. 4721 (2005).
[2] Van Wissen R., Golombok M., Brouwers J.J.H., Separation of Carbon Dioxide and Methane in Continuous Countercurrent Gas Centrifuges, Chemical Engineering Science, 60, p. 4397 (2005).
[3] Cohen K., "The Theory of Isotope Separation as Applied to the Large Scale Production of U 235", McGraw-Hill, New York, (1951).
[4] Cloutman, L.D., Gentry R.A., "Numerical Simulation of the Countercurrent Flow in a Gas Centrifuge", Technical Report, Los Alamos National Laboratory, (1983).
[5] Park J.K., Hyun J.M., Numerical Solutions for Thermally Driven Compressible Flows in a Rapidly Rotating Cylinder, Fluid Dynamics Research, 6, p. 139 (1990).
[6] Harada I., A Numerical Study of Weakly Compressible Rotating Flows in a Gas Centrifuge, Nucl. Sci. Eng., 73, p. 225 (1980).
[7] Ungarish M., Israeli M., Axisymmetric Compressible Now in a Rotating Cylinder with Axial Convection, J. Fluid Mech., 154, p. 121 (1985).
[8] Kai T., Hasegawa K., Numerical Calculation of Flow and Isotop Separation for SF6 Gas Centrifuge, Journal of Nuclear Science and Technology, 37, p. 153 (2000).
[9] Dongjun J., Shi Z., CFD Simulation of 3D Flow Field in a Gas Centrifuge, 14th International Conference on Nuclear Engineering, Florida, USA, (2006).