Non-isothermal extrudate swell

被引：26

作者：

Konaganti, Vinod Kumar ^{[1
]}

Derakhshandeh, Maziar ^{[1
]}

Ebrahimi, Marzieh ^{[1
]}

Mitsoulis, Evan ^{[2
]}

Hatzikiriakos, Savvas G. ^{[1
]}

机构：

[1] Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z3, Canada

[2] Natl Tech Univ Athens, Sch Min Engn & Met, Athens 15780, Greece

来源：

PHYSICS OF FLUIDS | 2016年 / 28卷 / 12期

基金：

加拿大自然科学与工程研究理事会;

关键词：

FLOW-INDUCED CRYSTALLIZATION; FILM BLOWING PROCESS; DENSITY POLYETHYLENES; FINITE-ELEMENT; SIMULATION; EXTRUSION; KINETICS; MODEL; INSTABILITIES; POLYOLEFINS;

D O I：

10.1063/1.4968826

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The non-isothermal extrudate swell of a high molecular weight high-density polyethylene (HDPE) in long capillary and slit dies is studied numerically (ANSYS POLYFLOW r) using an integral K-BKZ constitutive model including crystallization kinetics, determined experimentally. The Nakamura model is used for crystallization of the HDPE, where the crystallization rate parameter is evaluated by using the well-known Ziabicki equation. This non-isothermal extrudate swell phenomenon is simulated using the pseudo-time integral K-BKZ model with the Wagner damping function along with the differential form of the Nakamura model to account for the crystallization of the extrudate. The swell measurements were carried out under non-isothermal conditions by extruding the polymer melt at 200 degrees C through long capillary and slit dies to ambient air at 25 degrees C, 110 degrees C, and 200 degrees C. The numerical results are found to be in excellent agreement with experimental observations. Published by AIP Publishing.

引用

页数：19

共 50 条

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