Simulating multiphase flow in a two-stage pusher centrifuge using computational fluid dynamics
Tóm tắt
The design of two-stage pusher centrifuges have developed rapidly, but a good understanding of the theory behind their practice is a long-standing problem. To better understand centrifugal filter processes, the computational fluid dynamics (CFD) software program FLUENT has been used to model the three-dimensional geometry and to simulate multiphase flows based on Euler-Euler, moving mesh, dynamic mesh and porous media models. The simulation tangential velocities were a little smaller than those for rigid-body motion. In the stable flow region, the radial velocities were in good agreement with the theoretical data. Additionally, solid concentration distribution were obtained and also showed good agreement with the experimental data. These results show that this simulation method could be an effective tool to optimize the design of the two-stage pusher centrifuge.
Tài liệu tham khảo
Sandro S. Innovating the pusher centrifuge for bulk chemical separation. Filtration and Separation Technologies, 2003, 40(6): 38–39
Anlauf H. Recent developments in centrifuge technology. Separation and Purification Technology, 2007, 58(2): 242–246
Zhang J. New-fashioned two-stage pusher centrifuge and its application. Chinese Well and Rock Salt, 1994, 21(3): 31–32 (in Chinese)
Yan F, Farouk B. Numerical simulations of flows inside a partially filled centrifuge. Journal of Fluids Engineering, 2003, 125(6): 1033–1042
Zhao C, Yang D, Zhang C. Numerical simulation of liquid-solid two-phase flow in tubular bowl centrifuge. Journal of Filtration & Spearation, 2007, 14(1): 22–25 (in Chinese)
Romaní Fernández X, Nirschl H. Multiphase CFD simulation of a solid bowl centrifuge. Chemical Engineering & Technology, 2009, 32(5): 719–725
Jain M, Paranandi M, Roush D, Göklen K, Kelly WJ. Using CFD to understand how flow patterns affect retention of cell-sized particles in a tubular bowl centrifuge. Industrial & Engineering Chemistry Research, 2005, 44(20): 7876–7884
Deshmukh S S, Joshi J B, Koganti S B. Flow visualization and three-dimensional CFD simulation of the annular region of an annular centrifuge extrator. Industrial & Engineering Chemistry Research, 2008, 47(10): 3677–3686
Janoske U, Piesche M. Numerical simulation of the fluid flow and the separation behavior in a single gap of a disk stack centrifuge. Chemical Engineering & Technology, 1999, 22(3): 213–216
Fluent 6.3 User’s Guide. USA: Ansys Inc., 2006, 730–737
Yakhot V, Smith L. Renormalization-group analysis of turbulence. Annual Review of Fluid Mechanics, 1998, 30(10): 275–310
Zhang M L, Shen Y M. Three-dimensional simulation of meandering river based on 3-D RNG κ-epsilon turbulence model. Journal of Hydrodynamics, 2008, 20(4): 448–455
Kim M, Prost R, Chung H. A blind watermarking for 3-D dynamic mesh model using distribution of temporal wavelet coefficients. MRCS 2006, LNCS 4105: 257–264
Wang Y, Brannock M, Cox S, Leslie G. CFD simulations of membrane filtration zone in a submerged hollow fibre membrane bioreactor using a porous media approach. Journal of Membrane Science, 2010, 363(1–2): 57–66
Sun Q, Jin D. Principle structure and design calculation for centrifuges. China: Machinery Industry, 1984, 223–236 (in Chinese)