Experimental and simulation studies of heat transfer in polymer melts

Hongbing Chen, Uttandaraman Sundararaj*, K. Nandakumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The heat transfer of a single solid cylindrical poly(ether imide) (PEI) pellet in polyethylene (PE) melt under simple shear flow was studied using experiments and numerical simulations. This included two approximate 2-D representations of the geometry, and a rigorous 3-D geometry matching the experimental conditions. A generalized power-law viscosity model for PE melt, and temperature-dependent conductivity and specific heat were used for PEI in the models. Viscous dissipation was included in the simulations. From the experimental temperature history, the mean heat-transfer coefficient h̄ was determined to be 370 W/m2 · K, with the assumption of a uniform convective environment. From the simulation, h̄ was determined to be 1,160 W/m2 · K and 420 W/m2 · K in the 2-D simulations with circular and rectangular pellet, respectively, and 250 W/m2 · K for the 3-D simulation. Results from the 3-D simulation proved that the uniform convection assumption used to calculate h̄ for the experiment was not acceptable.

Original languageEnglish
Pages (from-to)1372-1382
Number of pages11
JournalAICHE Journal
Volume49
Issue number6
DOIs
StatePublished - 1 Jun 2003
Externally publishedYes

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