Analysis of Entrance Converging Flow of Polymer Melts. A Comparison between Liang Model and Cogswell Model

Abstract:

In this paper, a comparison between the Liang model and the Cogswell model is made by using them to simulate numerically the boundary streamline and the region length during the entrance converging flow of polymer melts. The results show that both of them can properly describe the flow conditions. Furthermore, the Liang model can accurately describe the geometry effect on the boundary streamline, and by introducing the Bagley correction factor e and the slip factor ξ, it can also describe the changes of the region length more precisely.

• Periodical: Advanced Materials Research (Volumes 311-313)
• Pages: 1110-1113
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.311-313.1110
• Online since: August 2011
• Authors: Lei Zhong, Hai Hang Xu, Ji Zhao Liang, An Ping Liao
• Keywords: Cogswell Model, Entrance Converging Flow, Liang Model

References

[1] F.N. Cogswell: Polym Eng Sci. Vol.12(1972), p.64.

[2] J.Z. Liang: Polymer-Plastics Technol. Eng. Vol. 46(2007), p.475.

[3] C.Y. Ma, J.L. White, F.C. Weissert, et al: Journal of Non-Newtonian Fluid Mechanics. Vol. 17( 1985), p.275.

[4] S.A. White, D.A. Gotsis and D.G. Baird: Journal of Non-Newtonian Fluid Mechanics. Vol. 24 (1987), p.121.

[5] J.Z. Liang: Polymer Testing. Vol. 24(2005), p.435.