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Heat transfer to molten polymers flowing through tubes
Author(s) -
Hulatt M.,
Wilkinson W. L.
Publication year - 1978
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760181505
Subject(s) - materials science , heat transfer , tube (container) , polyethylene , mechanics , thermodynamics , polymer , inlet , flow (mathematics) , shear (geology) , boundary value problem , composite material , mechanical engineering , mathematical analysis , physics , mathematics , engineering
A theoretical and experimental study of heat transfer to polymer melts flowing through circular tubes is presented. The mathematical model provides for shear heating and expansion cooling effects, and also heat of reaction during flow for various wall boundary conditions. Experimental results, obtained using low density polyethylene, show reproducible temperature and velocity profiles. The measured inlet melt temperature profile and the axial wall temperature profile provide the boundary conditions for the calculations. The experimental data confirm the predictions of the magnitude of the shear heating and expansion cooling effects during tube flow.