Experimental and simulation studies of heat transfer in polymer melts

Hongbing Chen; Uttandaraman Sundararaj; K. Nandakumar

doi:10.1002/aic.690490604

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 journal › Article › peer-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 language	English
Pages (from-to)	1372-1382
Number of pages	11
Journal	AICHE Journal
Volume	49
Issue number	6
DOIs	https://doi.org/10.1002/aic.690490604
State	Published - 1 Jun 2003
Externally published	Yes

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title = "Experimental and simulation studies of heat transfer in polymer melts",

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 {\=h} was determined to be 370 W/m2 · K, with the assumption of a uniform convective environment. From the simulation, {\=h} 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 {\=h} for the experiment was not acceptable.",

author = "Hongbing Chen and Uttandaraman Sundararaj and K. Nandakumar",

year = "2003",

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TY - JOUR

T1 - Experimental and simulation studies of heat transfer in polymer melts

AU - Chen, Hongbing

AU - Sundararaj, Uttandaraman

AU - Nandakumar, K.

PY - 2003/6/1

Y1 - 2003/6/1

N2 - 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.

AB - 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.

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DO - 10.1002/aic.690490604

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VL - 49

SP - 1372

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JO - AICHE Journal

JF - AICHE Journal

IS - 6

ER -

Experimental and simulation studies of heat transfer in polymer melts

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