Numerical Simulation of Flow Field Dynamics Characteristics for One Novel Twin-Screw Kneader

Abstract:

The numerical simulation for dynamic characteristics of the flow field of a novel twin-screw kneader is carried out. The flow field model of the twin-screw kneader is established, and the three-dimensional, isothermal and steady numerical analysis of non-Newtonian fluid is presented based on computational fluid dynamics (CFD) theory, and the characteristics under the conditions of different speeds and center distances such as the distribution of pressure and velocity field, the maximum shear stress, the mass flow rate and so on, are studied. The research results show that: with increasing speed, the maximum flow pressure, the mass flow rate, the maximum shear stress will increase; the maximum shear stress increases first and then decreases with increasing of center distance of the screw rotors, while the mass flow rate increases with increasing of center distance; but when the center distance reaches a certain degree, the mass flow rate will be negative and the material will appear serious reflux which can lead the kneader to stopping working.

• Periodical: Applied Mechanics and Materials (Volumes 271-272)
• Pages: 1049-1055
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.271-272.1049
• Online since: December 2012
• Authors: Jing Wei, Xin Long Liang, Wei Sun, Li Cun Wang
• Keywords: Computational Fluid Dynamics (CFD), Non-Newtonian Liquids, Numerical Method, Twin-Screw Kneader

References

[1] X.Z. Geng, Plastic mixing and continuous mixing equipment, Beijing: China Light Industry Press,2008.

[2] P.A. Fleury, Bulk polymerisation or copolymerisation in a novel continuous kneader reactor, Macromolecular Symposia.243(2006) 287-29.

DOI: 10.1002/masy.200651127

[3] U.W. Daniel, Axial Transport in Kneader Reactors, In Proceedings of the Society of Plastics Engineers Annual Technical Conference: Plastics Encounter at ANTEC 2007, 1(2007) 502-508.

[4] Y.X. Zhang, T. Lu, B. Jiang, K.S. Wang, B. Luo, Numerical Simulation of Polymer Melting during Preheating in Twin-screw Extruder, Journal of Mechanical Engineering, 45(2009)46-49.

DOI: 10.3901/jme.2009.04.046

[5] A. Khalifeh, J.R. Clermon, Numerical Simulations of Non-isothermal Three-dimensional Flows in an Extruder by a Finite-volume Method, Non-Newtonian Fluid Mech., 126(2005)7-22.

DOI: 10.1016/j.jnnfm.2004.12.002

[6] A.A. Tatarnikov, L.V. Burtelov, D.B. Gorbunov, Effect of Leakage Flow on Processing of Resinous Mixtures in the Pressure Zone of an Extruder, Chemical and Petroleum Engineering, 41(2005)174-179.

DOI: 10.1007/s10556-005-0083-9

[7] M.Y. Lyu, J.L. White, Simulation of Non-linear Viscoelastic Flow Behavior in the Buss Kneader, Journal of Reinforced Plastics and Composites, 19(2000)756-791.

DOI: 10.1106/r104-1and-pjv9-vjwm

[8] T. Yang, G.H. Zhang, Design of Cross Section Curves of Counter-intermeshing Twin-screw Kneader and Milling Cutters Blade Profiles, Journal of Chongqing University (Natural Science Edition), 29(2006)18-31.

[9] J. Wei, G.H. Zhang, F.J. Li, C.L. Jiang, Study on Parameter Optimization of Profile Curve Design on a Novel Differential Twin Screw Kneader, China Mechanical Engineering, 19(2008)787-792.

[10] J. Wei, G. Li, G.H. Zhang, Profiles Design, Optimization and Geometric Analysis of Rotors of a Novel Continuous Kneader Reactor, Journal of Reinforced Plastics and Composites, 29(2010)2279-2295.

DOI: 10.1177/0731684409348345

[11] G. Böhme, O. Wünsch, Analysis of Shear-thinning Fluid Flow in Intermeshing Twin-Screw Extruders, Archive of Applied Mechanics, 67(1997)167-178.

DOI: 10.1007/s004190050109

[12] H. Zhang, X.X. Zhang, L.C. Zhang, An Analysis of the Characteristics of the Thermal Boundary Layer in Power Law Fluid, Journal of Thermal Science, 17(2008)233-237.

DOI: 10.1007/s11630-008-0233-4

[13] A.A. Tatarnikov, L.V. Burtelov, D.B. Gorbunov, Effect of Leakage Flow on Processing of Resinous Mixtures in the Pressure Zone of an Extruder, Chemical and Petroleum Engineering, 41(2005)174-179.

DOI: 10.1007/s10556-005-0083-9

[14] J.N. Chen, Y.Y. Wang, J. Peng, Influence of the Screw Rotating Speed and Barrel Temperature on Polypropylene Injection, Transactions of Beijing Institute of Technology, 30(2010)109-113.