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A numerical model has been developed to simulate the polymeric flow and heat transfer in calendering processing. In the flow calculation, the polymer is treated as a thermal-dependent power-law fluids; in the coupled heat transfer calculation, both the roll and the polymer are modeled in order to assess the performance of various designs of calendering rolls. The numerical predictions agree very well with the on-line measurements. The generalized finite difference scheme was selected to cope with the numerical difficulties involved in the modeling of the process, especially the curved boundary and the free surface conditions. The computational aspects of the finite difference scheme in modeling of polymer behavior are also discussed.

A Finite Difference Study of Roll Design in Calendering Processing