Finite difference solutions of the heat equation in a molten polymer flowing in a circular tube

C. H. Leong, D. G. Mohr, Mohamed Elgindi, R. W. Langer

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1 Citation (Scopus)


We present the mathematical equations that govern heat transfer in a polymer melt flowing in a circular tube with constant ambient temperature, taking into account the viscous dissipation effects. This leads to a nonlinear parabolic partial differential equation. It is shown that the exact solution of a linearized version of the governing equation can be presented in terms of the Whittaker function. A finite difference scheme is used to produce an approximate solution of the linearized problem. This numerical solution is shown to be a good approximation to the exact solution found in terms of the Whittaker function. The finite difference scheme is then modified to approximate the nonlinear parabolic partial differential equation and is compared with the results found using the finite element method.

Original languageEnglish
Pages (from-to)289-294
Number of pages6
JournalJournal of Applied Polymer Science
Issue number1
Publication statusPublished - 5 Oct 2006
Externally publishedYes



  • Calculations
  • Modeling
  • Rheology
  • Thermodynamics

ASJC Scopus subject areas

  • Polymers and Plastics

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