Korea-Australia Rheology Journal

The Korean Society of Rheology (한국유변학회)
권호 표지

Three-dimensional numerical simulation for the prediction of product shape in sheet casting process

  • Published : 2000.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

Prediction of the product shape in sheet casting process is performed from the numerical simulation. A three-dimensional finite element method is used to investigate the flow behavior and to examine the effects of processing conditions on the sheet produced. Effects of inertia, gravity, surface tension and non-Newtonian viscosity on the thickness profile of the sheet are considered since the edge bead and the flow patterns in the chill roll region have great influence on the quality of the products. In the numerical simulation with free surface flows, the spine method is adopted to update the free surface, and the force-free boundary condition is imposed along the take-up plane to avoid severe singularity problems existing at the take-up plane. From the numerical results of steady isothermal flows of a generalized Newtonian fluid, it is shown that the draw ratio plays a major role in predicting the shape of the final sheet produced and the surface tension has considerable effect on the bead thickness ratio and the bead width fraction, while shear-thinning and/or tension-thickening viscosity affect the degree of neck-in.

Keywords

References

  1. Polym. Eng. Sci. v.31 Film casting of viscoelastic liquid Alaie, S. M.;T. C. Pananastasiou
  2. J. Non-New-tonian Fluid Mech. v.28 Draw resonance in film casting of viscoelastic fluids: A linear stability analysis Anturkar, N. R.;A. Co
  3. J. Nom-Newtonian Fluid Mech. v.30 Extensional effects in complex flows Debbaut, B.;M. J. Crochet
  4. Z. Angew Math. Phys v.46 Viscoelastic effects in film casting Debbaut, B.;J. M. Marchal
  5. Proc. Xth Int. Congress Rheology v.1 Extensional Flows of Inelastic Liquids Debbaut, B.;M. J. Crochet;H. Barnes;K. Walters
  6. Polym. Eng. Sci. v.30 Numerical simulation of the cast film process d'Halewyn, S.;J. F. Agassant;Y. Demay
  7. Polym. Eng. Sci. v.26 Causes of edge beads in cast films Dobroth, T.;L. Erwin
  8. Int. J. Num. Meth. Fluid v.4 Coating flow theory by finite element and asymptotic analysis of the Navier-Stokes system Kistler, S. F,;L. E. Scriven
  9. Korean. J. Rheol. v.2 Numerical predication of three-dimensional extrudate swell Lee, S. J.;S. J. Lee
  10. J. Materials Processing and Manufacturing Sci. v.1 A rheological study on the viscoelastic flow past spheres in a cylinder Oh, J. H.;S. J. Lee
  11. Int. J. Num. Meth. Fluid v.30 Numerical simulation of the film casting process Silagy, D.;Y. Demay;J. E. Agassant
  12. MS thesis Two Dimensional Numerical Study on Film Casting Process Song, K. S.
  13. J. Fluid Mech v.66 On the stability of extending films: A model for the film casting process Yeow, Y. L.