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TECHNICAL PAPERS

Numerical Simulation of Polymer Flow Into a Cylindrical Cavity

[+] Author and Article Information
Amit Kumar, P. S. Ghoshdastidar

Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, U.P.208016 India

J. Fluids Eng 124(1), 251-262 (Oct 15, 2001) (12 pages) doi:10.1115/1.1445796 History: Received December 06, 1999; Revised October 15, 2001
Copyright © 2002 by ASME
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References

Crawford, R. J., 1989, Plastics Engineering, Pergamon Press, 2nd Edition.
Kamal, M. R., Mashelkar, R. A., and Mujumdar, A. S., 1989, Transport Phenomena in Polymer Systems-2, Wiley Eastern Ltd., pp. 133–217.
Kamal,  M. R., and Kenig,  S., 1972, “The Injection Molding of Thermoplastics,” Polym. Eng. Sci., 12, pp. 294–302.
Wu,  P. C., Huang,  C. F., and Gogos,  C. G., 1974, “Simulation of Mold Filling Process,” Polym. Eng. Sci., 14, No. 14, pp. 223–230.
Hieber,  C. A., and Shen,  S. F., 1980, “A Finite-Element/Finite-Difference Simulation of the Injection Molding Filling Process,” J. Non-Newtonian Fluid Mech., 7, pp. 1–32.
Chiang,  H. H., Hieber,  C. A., and Wang,  K. K., 1991, “A Unified Simulation of the Filling and Post Filling Stages in Injection Molding, Part I: Formulation,” Polym. Eng. Sci., 31, No. 2, pp. 116–123.
Hetu,  J. F., Gao,  D. M., Garcia-Rejon,  A., and Salloum,  G., 1998, “3D Finite Element Method for the Simulation of the Filling Stage in Injection Molding,” Polym. Eng. Sci., 38, No. 2, pp. 223–236.
Pandelidis  , Ioannis  , and Zou  , Qin  , 1990, “Optimization of Injection Molding Design. Part I: Gate Location Optimization,” Polym. Eng. Sci., 30, No. 10, pp. 873–882.
Pandelidis  , Ioannis  , and Zou  , Qin  , 1990, “Optimization of Injection Molding Design. Part II: Molding Condition Optimization,” Polym. Eng. Sci., 30, No. 10, pp. 882–892.
Choi,  G. H., Lee,  K. D., and Chiang,  N., 1994, “Optimization of Process Parameters of Injection Molding with Neural Network Application in a Process Simulation Environment,” Ann. CIRP, 43, No. 1, pp. 449–452.
Han, Chang Dae, 1976, Rheology in Polymer Processing, Academic Press, New York.
Guceri, Selcuk I., 1989, “Finite Difference Solution of Field Problems” Computer Modeling of Polymer Processing, Charles L. Tucker III, ed., Hanser Publishers, pp. 142–236.
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Kamal, M. R., Mutel, A. T., Garcia-Rejon, A., and Salloum, G., 1991, SPE ANTEC Tech. Papers, Vol. 37, p. 483.
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Tadmor, Zehev and Gogos, Costas G., 1979, Principles of Polymer Processing, Wiley, New York.

Figures

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Cylindrical cavity to be filled by polymer melt
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The computational domain for isothermal filling
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The grid and the grid points in the computational domain
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The half physical domain for nonisothermal filling
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The position of advancing melt front as a function of time for constant injection pressure isothermal filling
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Flow rate versus distance for constant injection pressure isothermal filling
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Half melt velocity profile at various z-locations for constant injection pressure isothermal filling
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Plot of injection pressure versus time for constant flow rate isothermal filling
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Comparison of injection pressure versus time for nonisothermal and isothermal filling at constant flow rate
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Melt temperature fields at various z-locations for Q=0.515×10−4 m3/s for nonisothermal flow (case (iii))
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Melt temperature fields at various z-locations for Q=0.107×10−4 m3/s for nonisothermal flow (case (iii))
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Frozen skin layers for various flow rates for nonisothermal flow (case (iii))
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Pressure distribution in the cavity after filling for nonisothermal flow (case (iii))
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Melt velocity profiles at different locations during filling for nonisothermal flow (case (iii))
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Grid independence test for one case of nonisothermal filling of the cavity (Q=0.515×10−4 m3/s,Ti=2000 C,Tmold=600 C,z=0.0113 m, i.e., at 4.448% of the total length of the cavity)

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